6950X has never being £760, if it was that was one epic mistake and if I ever came across stock at such a price that was legit, not stolen or VAT fraud we'd buy 1000's of them, as they cost over £1200 trade now. Even when rate was strong the trade cost was still over £1000 and those prices are trade excluding VAT.
All components are purchased in USD, the pound weakens, the prices go up thats how simple it is.
Peripherals and monitors are different, they are either GBP/EU based or they are USD but on 3 month rolling contracts, so there prices hold relatively stable and then explode over night. Acer X34A was £899 here until a couple of weeks ago, its now £1049.99 as Acer's quarter rolled over and they updated the rolling rate from 1.45 down to sub 1.30.