The decline of the Church of England has been well publicised for many years. Because of the connections between church and state the future survival of the church is of interest to many agencies, both Christian and otherwise. Any new attendance figures are likely to make mainstream news, with discussion of the church’s future prospects. In this blog I will apply one of my church growth models to the Church of England attendance figures and examine how serious that decline might be. First let me set the context.
The Christian Church in the UK has been steadily declining for over 50 years. With a total church membership reaching a peak of 10.3 million in 1930 a slow decline followed with a brief recovery through the 1950s. Since 1960 membership has fallen from 9.9 million in 1960 to 5.9 million in 2000 . It was down further to 5.5 million in 2010 . Not surprisingly the Church of England’s membership has fallen in a similar fashion, from 2.9 million in 1960 to 1.2 million in 2010 [3,4].
Before analysing figures for the Church of England, some comparisons would be useful. Church decline is remarkably slow compared with the decline in membership of other institutions. For example political parties fare very badly, with the conservative party falling from a high of 2.9 million in 1951, to 1 million in 1990 and to less than 150,000 in 2012 [5,6]. Similar dramatic falls are recorded for other political parties and the Trade Union movement. Church decline is part of a wider decline in commitment in Western society, and by no means the worst. So although the Church of England is right to be concerned about its decline, it has been considerably more successful in resisting that decline than non-religious institutions of a similar size.
This blog seeks to answer two questions: Will the Church of England continue to decline? If so will it become extinct or is there any sign of a recovery?
A straight statistical projection would indicate that the Church of England will eventually become extinct, although long after most of the other UK mainstream denominations (and well after the major political parties!) But statistical projections only examine data, they do not factor in any theory as to why a church grows or declines. Thus they may miss some underlying reason why the church may not go extinct.
Limited Enthusiasm Model
The approach I have taken is to construct a model based on the theory that church growth is driven by a sub-class of church members, called enthusiasts, who are instrumental in bringing about conversions into the church. The model is then compared with church data in order to estimate model parameters, and determine the likely future for the church, assuming the theory is correct . Unbelievers are also split into those who are open to joining the church and those who are hardened to the church.
A key result of this “Limited Enthusiasm” Model is the existence of two thresholds, or tipping points, connected with extinction and revival-growth. These thresholds are compared with the reproduction potential, which measures the ability of enthusiasts to reproduce themselves . If the reproduction potential is under the extinction threshold the church eventually declines to zero, if it is over the threshold the church survives. Likewise if the reproduction potential is over the revival-growth threshold, church growth is rapid, similar to that seen in religious revivals. Both thresholds depend on the birth, death and loss rates, and the revival-growth threshold also depends on the current fraction of open unbelievers in the population.
Although some of the model parameters are difficult to determine the placement of the reproduction potential compared with the thresholds is more robustly determined. Thus it is possible to be more confident of a church’s extinction or survival, even if there is more variation in the parameter and threshold values. Essentially the model is interpreting curvature in the data in terms of the behaviour of enthusiasts. Thus if the decline is slowing it may indicate enthusiasts are reproducing themselves enough for the church to survive.
Analysis of Church of England Attendance 1979-2005
Attendance is a much better indicator of participation than membership in the Church of England as the latter is based on electoral role, which has not always required participation as a reason for inclusion. However it is only in recent history that attendance figures have been consistently obtained. The methodology for their collection must be consistent over time otherwise curvature in the data set will be wrongly interpreted.
My earlier publications in church growth were based on the English Church Attendance Surveys conducted by Christian Research, under the then leadership of Peter Brierley . By the 1998 attendance survey the Church of England was under the extinction threshold, although not massively so . By the 2005 survey its situation had improved, the church was just on the extinction threshold . That is the Church of England was just avoiding future extinction. Unfortunately there have been no more attendance surveys since, so no further results can be obtained from this source.
Analysis of Church of England Attendance 2001-2011
Since 2001 the Church of England has been reporting its own attendance figures. Although these cannot be compared with the figures of Christian Research, they use different methodologies, the data can be used to assess the extinction/survival status since 2001. The most recent data is for 2011 . Additional data sources, such as birth rates etc., are used to estimate a number of model parameters .
The data used is the combined all-age Sunday and weekday attendance [12, table 4]. Weekday attendance at churches has been growing, perhaps due to an aging population, and due to churches being more willing to diversify in their approach to reaching communities. It has now become sufficiently large that it cannot be ignored. The church quotes highest, average and lowest figures. The average has been used. Because the Limited Enthusiasm model is interpreting changes over time, it is not critical which of the three data sets are used, providing they have been consistently measured each year.
A best fit between model and data gives a value for the reproduction potential and the two thresholds. Many such “best fits” are obtained for a variety of other parameter values . The majority of best fits, 66%, indicate that the church will avoid extinction, however there is no convincing sign that there is any underlying revival growth. The most likely scenario is that the Church of England will survive, but at a significantly reduced level.
It may be helpful to compare a typical pessimistic data fit, where the Church of England eventually becomes extinct, with an optimistic fit, where the church survives. Figure 1 compares two such fits with the data . There is little to choose between them on the basis of the data from 2001 to 2011. However extrapolating from 2012 onwards the optimistic scenario shows increasing signs of a slow down in decline. The predicted difference by 2020 is quite significant.
Figure 1: Best Fit to Church of England Attendance 2001-2011
On the basis of attendance figures alone it is not possible to distinguish between the pessimistic and optimistic fits. To draw a clearer conclusion additional information is required, such as the number of enthusiasts, which would be very difficult to measure. However evidence for the effect of enthusiasts, such as increasing use of the Alpha course, community engagement, prayer meetings, church planting etc. might be easier to obtain, and would help in given more confidence in one scenario over the other.
The two scenarios can be extrapolated further into the future, assuming enthusiasts remain at the same effectiveness. The top graph of figure 2 gives church attendance. The pessimistic fit shows decline at the same rate to almost 2040, however the optimistic fit suggest the church starts growing again after 2035. This is due to a recovery in enthusiasts, as seen in the bottom graph of figure 2. In the optimistic scenario the enthusiasts start increasing again, nationally, after 2020. This is enough for the church to avoid extinction and dropping below an attendance of 800,000, but not enough for it to return to the 2001 figure.
Figure 2: Church of England Attendance & Enthusiasts Extrapolated to 2040
As optimistic scenarios were the more common of the data fits then there is some confidence that the Church of England may not be declining so much as to become extinct and will see a small recovery in the next 20 years.
There are a number of conditions that must be applied to this result.
1. The church has an increasingly older age profile than society, thus the death rate of its attenders will increase over time. Thus recovery would take longer. The above scenarios in the previous graph are not predictions for actual numbers, but an indication that the Church of Engalnd is most likely above the extinction threshold.
2. The model aggregates together congregations that are dying through aging, perhaps the majority, with a smaller number of growing and healthy congregations where most of the enthusiasts are based. In that case the underlying growth in enthusiasts would be underestimated and the reproduction potential of the enthusiasts should be higher. Thus the church would be more likely to see a future recovery. Such a recovery would involve churches with enthusiasts re-starting congregations in redundant parishes so that new pools of unbelievers can be tapped.
3. The birth rate has been assumed to remain constant. It has increased recently in the UK, and this may make future growth in the church a little easier.
4. Migration has been assumed constant. Migration has had a large impact on Pentecostal and independent churches in London, but it is doubtful if it has had much impact on the Church of England nationally. Migration may fall in the future; there again it may increase.
Strategies to Improve Church of England’s Attendance
If the Limited Enthusiasm Model is correct then strategies that improve the number and the quality of enthusiasts are the key to church growth. Such improvement can come through spiritual renewal, mission training, discipleship, community contacts and outpourings of the Holy Spirit. It is not a question of choosing one over the other but of using all. For many churches it can start with a change of awareness that the individual members of a congregation are as important to its growth as its leaders, and that each person needs to embrace that responsibility.
In addition the thresholds of extinction and revival growth can be lowered by improving retention of adults and children in the church. Widening the contact between a church and its community will further lower the revival-growth threshold, making rapid growth more likely. A combined policy of improving enthusiasts, stemming losses, and increasing community contacts can make the difference between extinction and revival .
Although the Church of England is declining, and will do so for some time, there is evidence that its ability to avoid extinction is improving. If it continues to apply policies to generate enthusiasts and retain people, and makes those policies more widespread, it is very possible that sustained decline can be turned into sustained growth. Although this research cannot be used to predict actual numbers I hope it will be used to give encouragement to the Church, that it can survive and turn decline back into growth.
Church Growth Modelling, churchmodel.org.uk
I have posted an update on these results for 2012 data
References and Notes
 Brierley P. Religious Trends 2000/2001, no.2. Table 2.12, page 2.12, Christian Research. There is no reliable measure of attendance for most Christian denominations spanning 1900-2000, thus membership is the best indicator of church growth and decline for this period.
 Brierley P. UK Church Statistics 2005-2015, table 1.1.1 page 1.1, Brierely Consultancy.
 Brierley P. Religious Trends 2000/2001, no.2. Table 8.2.1, page 8.2, Christian Research.
 Brierley P. UK Church Statistics 2005-2015, table 2.1.2 page 2.1, Brierely Consultancy.
 McGuinness F. Membership of UK Political Parties, Research Briefing, Standard Notes SN/SG/5125, House of Commons, London, UK, 2012.
http://www.parliament.uk/briefing-papers/SN05125 [last accessed 2/10/13]
 New Statesman, July 30, 2012, How Tory Membership has Collapsed under Cameron,
http://www.newstatesman.com/blogs/politics/2012/07/how-tory-membership-has-collapsed-under-cameron [last accessed 2/10/13]
 The Limited Enthusiasm Model is explained on the Church Growth Modelling website at:
and in the publications and conferences on
 In epidemiology the reproduction potential is called R0, the basic reproductive ratio, or basic reproduction number.
See http://en.wikipedia.org/wiki/Basic_reproduction_number [last accessed 2/10/13]
The limited enthusiasm principle is similar to the spread of a disease. In this case the disease is religion, as measured by church membership or attendance.
 Brierley P. (2006) Pulling Out of the Nosedive - What the 2005 English Church Census Reveals, Christian Research.
Brierley P. (2000), The Tide is Running Out - What the English Church Census Reveals, Christian Research.
Brierley P. (1991), Christian England - What the English Church Census Reveals, Christian Research.
 Hayward J. (2005) A General Model of Church Growth and Decline, Journal of Mathematical Sociology, 29(3), pp.177-207.
 As I reported in "Challenge to Change: exploring strategies for an effective Church in a post-Christian landscape", June 2009.
 Statistics for Mission 2011. Church of England website
follow link: Provisional Attendance and Affiliation 2011
released 7/5/13. [last accessed 2/10/13]
 A number of parameters in the model needed to be estimated from sources other than the attendance data. Birth and death rates are taken from recent figures published by the Office for National Statistics (ONS). Migration is added to the birth rate. Average figures are taken.
The reversion rate is estimated at 5% per year, typical of figures that were obtained by data fits to a variety of churches . It should be noted that small variations in this figure have little effect on the likelihood of extinction or survival.
Retention of children born to church members is taken as 30%. This figure is based on religious transmission rates for Christianity given as a comparison with Islam in “Intergenerational Transmission of Islam in England and Wales: Evidence from the Citizenship Survey”, Scourfield J., Taylor C., Moore G., and Gilliat-Ray S., Sociology, 46(1): 91-108. For a summary see:
The average time taken for a leaver to be open to returning to church again was taken as 20 years. This figure is based on a past survey where only 20% of those who leave church return and that after an average of 10 years. [9, The Tide is Running Out, p.84]
 Estimates of initial numbers for 2001 need some care. Although the total population and the numbers of believers are known (ONS and  respectively), it is not possible to even guess the fraction of the church who are enthusiasts, or the fraction of unbelievers who are hardened. Instead many simulations are run with a variety of values and best fits obtained for each. The number in the hardened group is assumed not to change dramatically during the period.