In my previous post I used Pupil Teacher Ratios (PTRs) as a measure that is largely consistent over time in the manner in which it has been calculated to discuss overall changes in the staffing levels of schools. One slight change in how PTRs have been calculated has been the classification of unqualified teachers and instructors within PTRs and the increase in school-based preparation courses. This may have caused some PTRs to look better than they actually are in reality.

For around 70 local authorities, a time series of overall PTRs can be constructed stretching from 1974 to 2017. These include the Outer London boroughs; the metropolitan district (forming the main conurbations outside London) and a number of shire counties where a unitary council has not yet been abstracted from within the 1974 boundaries created when the former county boroughs were changed to two tier County and District councils.  There aren’t any PTRS for the inner London boroughs, because in 1974 these boroughs were part of the ILEA and reported as a single unit until the ILEA was broken up into its constituent boroughs.

Although the time series could be traced back until 1974, I have only been able to find Statistical Bulletins on PTRs back until 1979; the last year of funding decided by the Labour government that was defeated later that year by Mrs Thatcher’s Conservatives.

Looking at the PTRS for the 71 mainland authorities, one is struck by the fact more than a third of local authorities retain a similar ranking position at the start and end of the 38 year period (with change of +/- 10 places in each list). This is especially trueof six local authorities with the most favourable overall PTRS in 1979. Two of them still occupy places in the six local authorities with the most favourable PTRS in 2017. All six are in the top 11 authorities with the best PTRS in 2017.

At the other end of the table, the two worst shire counties in 1979 have improved their positions slightly, but Oxfordshire remains in 17^th worst place in the list – exactly where it was in this list of local authorities in 1979. In 1979, some local authorities still had three tier systems and those with Sixth Form Colleges had their staff included in the PTR tables as part of the secondary sector. Changes to one or other of these systems may account for some of the large movements within the ranking.

Overall the worst PTR in 1979 was 21.1, whereas in 2017 it is 19.8; an improvement of 1.3 pupils per teacher. This may have been partly paid for by a deterioration of the best placed authority in the list. The best PTR in 1979 was 15.1 – leaving aside the Isles of Scilly as a special case. In 2017, the best placed PTR was 16.1: one pupil per teacher worse than in 1979.

If PTRS continue to deteriorate over the next few years, as seems likely at present with increasing pupil numbers not fully providing for additional costs, then may be by the end of 2019 PTRs will be the same as they were in 1979 across a larger number of local authorities whether they have academies; free schools or retain maintained schools.