There's also a lot of price gouging that goes on in the UK with products of limited supply because there's a decent number of people who will pay in the order of £100 markup prices just to have the cards a few weeks earlier than other people. And retails will typically exploit this fact.
There's also import tax on goods coming into the country, as well as international shipping and then VAT on top of that.
Give it 2 months when stock is back up the gouging stops and then when they launch the non-founder variants, they will be significantly cheaper, I'm hoping £500 or a bit under.