I found this RAF OOB source that looks great. http://www.rafweb.org/Index.htm It appears to cover each of the RAF squadrons from establishment to the present day and includes the dates for the various equipment change-overs and their basing locations/deployments over the years.
This shows some twin engine bombers available along with several additional types of fighters and fighter-bombers. I've extracted and summarized data for the first 25 squadrons below. These are probably among the new aircraft that Tanker was talking about for 1.3.
Some observations after studying the web site above:
The RAF had a big land-based air force by the start of the late scenario:
Great Britain: 28 fighter, fighter-bomber, or level bomber squadrons, 6 twin engine heavy bomber squadrons, three experimental/auxiliary squadrons
Middle East: 8 fighter, fighter-bomber, or level bomber squadrons, three transport squadrons, and one float plane squadron (Malta)
India: 6 figher-bomber or level bomber squadrons.
This talley doesn't include the carrier flights. About a third of squadrons in Great Britain were Royal Auxiliary Air Force which comprised a combination of reserve and active duty personnel. The Middle East by my count here stretches from Malta to the Sudan to Iraq and points in between. The aircraft in India were mostly on the Northwest Frontier.
During the course of the late scenario a number of single engine and patrol (flying boat) squadrons were added. Setting aside play-balance concerns, if you start with about 50 squadrons in the peace-time RAF, and see 18 more added between 7/26 and 12/30 under peace-time conditions, the stock reinforcement schedule for WPO's late scenario is greatly understated. Also, the squadrons on the Northwest Frontier and Iraq were essentially flying combat ground support missions so the pilots would have a reasonable amount of recent experience and pilots with Great War experience would not yet be "over the hill".
For historical RAF deployments to the Far East, one fighter-bomber squadron was briefly based in Shanghai during 1927 and a flying boat squadron was permanently stationed in Singapore from 1928.
For the 1922 Scenario things aren't as well developed. The RAF was about 200 squadrons by the end of the Great War and demobilized almost everything by 1920. In 1922, the RAF was down to
9 squadrons of single engine warplanes (SEW) in Great Britain, 8 SEW + three transport squadrons in the middle east, and 6 SEW squadrons in India. So the growth from 1922 to 1926 was 19 squadrons in Britain plus the six heavy bomber squadrons.
In either case, a hot war in the Far East would result in additional military appropriations and accelerate the rebuilding of the Royal Air Force.
