The UK presents an interesting dilemma for the Allies because their empire is spread out over the entire world. So you want to use a strategy that you think will maximize those units (already on the board) potential while you allow yourself the time to build up your army/navy from London and move out from there.
With Britain, there are many ways to reinforce Russia. Deciding what to do is very dependent on the German first turn.
One British infantry should be placed in Egypt with cash advance, all othe IPC’s to Russia.
UK is primary defender of Africa and cannot easily ship reinforcements there, so the UK should recieve the $12 dollars at the beginning. Place an artillery in Malta with the fighter, and a submarine in Gibraltar with the Destroyer. Germany will likely concentrate its fleet clearing Malta, which you can then counterattack with four ships.