A mildly tall if tree
1 of the 2 torpedoes that hit HMS Courageous goes clang instead of bang and while damaged the carrier and importantly the crew survives and is back in action during mid 1940
Renown slaps the twins about a bit more in April 1940 and following the losses sustained by the rest of the fleet both ships are not risked and so HMS Glorious does not get to 'forget she is a man O war' in June 1940
This results in a reasonably more effective operation MB8 (of which operation Judgement - the attack on the Italian fleet at Taranto - was a main component) - with HMS Courageous joining the op and HMS Ark Royal and her air group joining the attack on Taranto with HMS Illustrious tripling the number of torpedo carrying Swordfish and resulting in all 5 Battleships and 3 heavy cruisers being sunk in the harbour along with damage to other ships
This gives the RN a larger material advantage over the Italian surface fleet compared to OTL
Operation compass is even more successful and no British/Australian/New Zealand forces sent to Greece due to a massive disagreement between various national leaders
Instead the Imperial forces in North Africa are largely retained with the NZ Division instead sent to garrison Crete (with its full TO&E intact) allowing Greek forces to fight on the main land.
At about the same time Cunningham is able to push through his plans for Malta to be stood up with increased defences, supplies and air power
As a result Rommel's build up in North Africa is slower as more shipping is interdicted over OTL
So he is not able to launch Operation Sonnenblume before April 1941 and against a far stronger more prepared 8th Army and he does not enjoy the same successes as OTL
In May 1941 the Germans launch the invasion of Crete, their intel not appreciating that the entire 2nd New Zealand Division is on the island with tank support and their full Artillery and M/T intact (OTL most was lost in Greece), is decimated on the first day (their LZs malleted by 25 pounder artillery and sufficient motor transport allowing reserves to be rapidly moved to the point of threat) and follow on forces are simply reinforcing defeat before the German commanders call of the attack on the evening of day 2 with the balance of the Fallshirmjeager division lost and heavy losses to the German Transport fleet.
All this results in far milder losses to the RN and the army not losing 1.5 divisions in manpower and 5 plus divisions worth of heavy equipment, Artillery and transport!
This results in a sooner release of Australian forces from the 8th Army as well as an additional Indian Army Division and the movement of 7th Armoured Brigade with all 3 battalions reequipped with M3 Stuarts stood up in Malaya under command 2nd Australian Imperial Force
In addition a more powerful RN force is sent to Singapore and all P40s (
about 476 were sent to the middle east by end of Dec 41) are sent to the region and become the mainstay of the far eastern air forces for the next 2 years
With a far stronger Imperial force in Malaya the Japanese invasion goes badly and is forced to retreat in April 42 and having swallowed up additional units there is no invasion of DEI or Burma.
This keeps Rangoon open and increased equipment sent to the Chinese
Long story short this results in earlier defeats of the Japanese......and my lunch break is over
This allows the Commonwealth forces to grow stronger during the rain season and by Nov that year despite defeat in the Philippines the allies are virtually unassailable with a number of naval victories by the USN led allied navies effectively gaining the initiative by the end of 1942