261 squadron is a bad example to use. The 261 squadron that flew over Malta was not the same 261 squadron that flew over Burma.
261 formed on Malta in Aug 1940 to take over the various Gladiator & Hurricane flights defending Malta. The survivors were absorbed into 185 squadron in May 1941.
127 squadron was formed out of No 4 Service Flying Training School at Habbaniya in Iraq in June 1941in the aftermath of the 1941 Iraq Revolt in which aircraft from that unit, and the airfield itself, played a major part in defeating. It then briefly saw action against Vichy French forces in Syria before being remembered as 261 squadron on 12 July. It then flew defensive operations over Iraq, Palestine & Cyprus until it was ordered to Ceylon in Feb 1942 and fought in defence of Colombo on 5 April 1942 losing some 8 aircraft to IJNAF Zeros. 261 wasn't moved to the Burma front until Jan 1943.
It is true that the RAF as a whole had experience in other theatres. However it is also true that there were few pilots with that experience in the squadrons already in and sent to the Far East at the beginning of 1942 because most had been newly formed during the course of 1941 whole with pilots straight out of OTUs. Those with experience were ggenerally filling roles as squadron & flight commanders. But it was very much a case of learn to adapt tactics or die at the hands of the enemy. So quite an incentive to learn and learn fast!
I'd normally bow to your greater knowledge but after checking the potted 261 history by Shores et al in "Malta, the Hurricane Years" it seems that we've each got it partly right. Shores says that 261 was disbanded in Malta in May 1941 with most of the pilots dispersing, some going to 249, some going to 127, and others elsewhere. Shores says that "a handful" of ex-Malta pilots went into the reformed 261 that was created in Iraq.
In the BBM database of pilots it's noted that F O N. Doughty was 'sent to Takali airfield for use by 261 Squadron in the defence of Malta. Doughty, however, only stayed until 6th July when he was posted to 127 squadron at Kasfareet in Syria flying Hurricanes…..On 12th of July, 127 squadron was absorbed into 261, Doughty
rejoining his old unit on the 17th by flying six Hurricanes from Deir Ez Zor to Habbaniya." It is also stated that he joined the "reformed 261 as flight commander…..". My emphasis.
There's a personal account on Fl Lt Pickering of 261 which refers clearly to the squadrom's "departure from Malta in about June 1941" on p. 409 of Shores et el - not disbanding. He refers to the need to alter tactics when fighting the Italian aircraft compared to when fighting 109s in the BoB and also that later experience in the Far East showed how tactics had to be altered for local conditions- something which was too often ignored. Pickering, together with fellow ex-261 pilot Len Davies, certainly flew in Burma - see Bloody Shambles Pt 3 p 372.
Birtles on p. 146 of "Hurricane: the illustrated history" says that in late May '41 261 (which had been a very big squadron earlier in Malta) was relieved by 249 Squadron. 261 was "relocating to the Middle East" (again, not being disbanded) and took 249's new Hurries, leaving 249 with old planes and no kit.
The carriers that flew off 249 are said to have flown off 48 Hurries in 3 squadrons although Birtles doesn't give a number on how many 249 had. All of 249's planes made it so we could possible assume they had 16+ Hurries that 261 took. When 185 was formed to go alongside 261 Birtles says there were 50 Hurries on the island, with 10 lost by the time 249 came.
Since 185 was formed from a nucleus of 261 it's probably quite likely that 261 had at least 25 Hurries (50% of the force) when the new squadron was formed and 20 when 249 arrived. So according to Birtles only some of 261's survivors were formed into 185 and 16 or so ex-249 Hurries were flown by 261 to their new home in "the Middle East" when 261 was "relocating".
So from Shores et al, Pickering (a first-hand source) and Brtles, it appears that some of 261's pilots went to 249 together with 261's old planes. The other 261 pilots flew out of Malta and the squadron was disbanded for a while but reformed with several of the earlier Malta pilots. Perhaps the "disbanding" was a planned bureaucratic way to clear the decks and do some pilots selection and reorganisation, give exhausted pilots a change of scenery or at least a rest, and then re-form 261 around a nucleus of old hands?
Some of these ex- "Malta 261" hands and other Malta pilots formed a reasonable proportion of the Far Eastern RAF in the early Pacific War. Shores et al's potted bios of Malta pilots also shows that about a dozen of them flew in Burma and Sri Lanka about that time. We know that least one (Pickering) specifically noted that the RAF had to change tactics to match the Italian aircraft and also to match the conditions in Burma, and that some pilots did so. We know that this was done by February 1942.
So we know from a very good source, or three, that a significant bunch of ex-Malta pilots were in Burma and Sri Lanka at the time; we know that some of them dropped the old "Battle of Britain" tactics and adopted new ones to suit the characteristics of Japanese aircraft quickly; and we know that some of them knew this sort of flexibility was required. That seems to add up to making it pretty clear that the RAF pilots were not slow-learners wedded to tactics that had worked against 110s and 109s - they were intelligent, aware of the need to change the tactics to meet the situation, and did so quickly.