For what it's worth it looks as if the successors to Duncan Sandys out did him if the September 1957 version of Plan L is to go by. This covered the period from 30th June 1957 to 31st March 1963.
At 30th June the Actual Establishment of Fighter Command was 512 fighters in 32 squadrons of 12. Half were night fighters with a mix of Javelins, Meteor and Venoms. The other half was all Hunter day fighters.
This was to be reduced to 280 aircraft in 20 squadrons (120 Hunters in 10 squadrons of 12 and 160 Javelins in 10 squadrons of 16) by 31st March 1959. The mix of day fighters to all-weather fighters was to remain the same until 31st March 1961. However, between then and 31st March 1963 it would change to 124 all weather fighters in 8 squadrons (7 with 16 each and one squadron of 12) and 156 day fighters in 12 squadrons (3 with 16 each and 9 squadrons of 12), but the grand total was still 280 fighters in 20 squadrons. The S.A.G.W. force o 31st March 1963 was 7 sites with 384 launchers and 468 missiles.
The first Lightning F Mk 1 squadron with 12 aircraft was to be formed by 30th September 1939 and by 31st March 1960 there would be 36 in 3 squadrons of 12. This force was to be maintained until 31st March 1962. However, all 3 squadrons had disappeared from the planned order of battle by 31st March 1963.
The first 2 Lightning F Mk 2 squadron with 12 aircraft each were to be formed by 30th September 1960. The Mk 2 force would reach its peak on 31st March 1962 when there would be a front line of 120 in 9 squadrons (that is 6 squadrons of 12 and 3 squadrons of 16). On 31st March 1963 there were to have been 108 in 8 squadrons (that is 5 squadrons of 12 and 3 squadrons of 16).
4 squadrons of 12 Lightning F Mk 3 fighters were to be formed between 1st April 1962 and 31st March 1963.
Then there would have been a grand total of 156 Lightings in 12 squadrons (108 Mk 2 in 8 squadrons of 12 or 16 aircraft and 48 Mk 3 in 4 squadrons of 12) in RAF Fighter Command, but no squadrons overseas.
Under the Ministry of Supply production programme, dated 3rd Jul 57, and confirmed on 22nd Aug 57 it was planned to procure 318 Lightning fighters (50 Mk 1, 158 Mk 2 and 110 Mk 3) plus an undermined number of Lightning trainers. 276 of the aircraft (50 Mk 1, 158 Mk 2 and 68 Mk 3) were scheduled for delivery by 31st March 1963.
I don't have any information on Plans M, N and O. The next one I have is the March 1964 version of Plan P which covered the period from 31st March 1964 to 31st March 1975.
According to that plan on 31st March 1964 RAF Fighter Command actually had 88 fighters in 7 squadrons. That is 28 Javelins in 2 squadrons of 14, 36 Lightning F Mk 1 and 1A in 3 squadrons of 12 and 24 Lightning F Mk 2 in 2 squadrons of 12. There were no Lightning squadrons overseas. There were only 64 Bloodhound Mk 1 missile launchers at 2 sites and they were due to be disbanded by 30th June 1964, but there were was a training flight of 4 Bloodhound Mk 2 launchers which was to be expanded into a squadron of 12 launchers by 30th June 1960.
So the RAF Fighter Command of the 1963-64 period only had 88 fighters in 7 squadron instead of the 280 in 20 squadrons planned 6 months after Mr Sandys read his infamous White Paper. The S.A.G.W force had only 68 launchers instead of the 384 planned.