Well, my watch is over...
Just decided to go ahead and switch from 3080 Eagle OC to the 3070TI Gaming OC. It cost me £40 over and above the £650 I paid on launch day. The team were really helpful and said that they had my (new) model in stock and would be dispatched later today or tomorrow.
Seeing as I'm upgrading from 1050TI, hopefully that will help cool the UK down and stop the insane temperatures round here...
I hope everyone manages to get their cards sometime soon! Many thanks to
@Gibbo and
@ScottiB for all their help.