We have Theresa May to thank for the reduction in police numbers by 20,000. There are now 90,000 in the UK...being simplistic, divide this by 4 which will give you the number on duty at any one time taking into account of a basic 4 shift system (earlier/lates/nights and rest days. 22,500 max at any one time for the whole UK......with a population of around 64 million. Yes in the UK policing is by consent.....but this is taking the mickey.
I didn't question your figures on this post, because frankly I had no idea what the numbers were, however, having now looked them up I offer the following.
Figures are for England and Wales only, Scotland for some reason are kept separately.
Police workforce, as at 31 March 2016, England and Wales (I haven't found anything more recent yet)
...................................................Rank All staff (FTE) ........... Staff available for duty (FTE)
Chief officers1.....................................196 ........................................194
Chief superintendents.........................321.........................................318
Superintendents..................................801.........................................794
Chief inspectors..................................1,581......................................1,549
Inspectors...........................................5,692.......................................5,567
Sergeants...........................................18,839....................................18,277
Constables.........................................96,637.....................................92,080
Total police officer ranks....................124,066..................................118,779
Police staff..........................................61,668....................................58,807
Police community support officers.....11,043................................... 10,470
Designated officers............................4,130....................................... 4,002
Traffic wardens..................................15.............................................15
Total police workforce........................200,922....................................192,072
Special constabulary2.......................15,996 -