Have you considered the South African store?
Will be live at 11pm UK time, and also works out at 38 quid. It's also EU region so no different to the UK version.
Other advantage is all you need to do is go to mynintendo.com change your region and you can use your uk debit/credit card, make your purchase and then change your region back to UK. No messing about with creating additional accounts and having all your purchases spread across different accounts.
I've bought all my games this way. It's actually cheaper than buying physical.
It's showing as 669 Rand, and 3.3Gb on the South African eShop.