Umbrel home Power UK

Hi Just received my Umbrel Home but having some issues and also a question. The power supply that comes with it is 12v, which i understand is more of a convention and doesnt have to be supported in USB PD means its harder to source an alternative Power supply. This is kind of disappointing as if it was 15v there would be plenty of standard adaptors i could use

Second i am not sure how i supposed to use the power plug that comes with it, there seems to be a 2 pin adapter that has a label called a UK adaptor that you push over the american style pins but its impossible to use as UK sockets use British Standard BS1363 (been around since 1947) have a safety feature that means the earth pin is required to be pushed in first to open the plastic blockers for the live and neutral pins. So the socket adapter cannout actually be used in the UK, how am i supposed to power this without actually going and buying a non standard power adapter.