200/fold?
I think this is actually a decent option. Maybe better than calling.
This was actually my main consideration, although big stacks I think we should prolly go £275 - £325 but I kinda like it, firstly I don't think we get raised all that often, if George has 66 then im either value-raising a hand that has 3-5outs or bluffing and likely dead to 2 outs, and he would just call 56 aswel (If he has all big cards with it - which he almost certinly always will) then he'll wanna keep me in with my weakest stuff (I can be bluffing + playing worse than 56 for value unlike most people in these games and GW knows me v well) I'll get to the river card for free quite often + he will fold sometimes (ofc he'll ever ever fold worse hands but it's not a bad result playability wise)
£300/fold, check turn unless improved as a good plan then? Doesn't seem any merit to betting the turn unimproved?