Just before the Christmas break, the Bank of England released this image of our new "paper" currency (Polymer really), bearing the image of our King.
These will come into general circulation in 2024 alongside the existing Queen Elizabeth II Notes, which will be gradually phased out. Per convention these will be legal across the UK (and wider British Isles) but Northern Irish and Scottish banks for example, will be free to issue their own versions. Their Notes may well look considerably different and if the current situation is anything to go by likely to cause difficulties for anyone using them in Wales or England. We don't like to make things too easy for visitors, do we LOL?