Did you ask OCUK by phone or Support ticket if they could flash the bios of that board you want before shipping it to you ...never know ?
They said they dont offer this service so its either wait and buy a x570 or buy a 450/470 and buy a ryzen 1200 for £55 to flash the bios. So the gigabyte would essentially be £170. i imagine i could get a 570 for £200 with out having the hassle of flashing the bios so i might as well just get a 570