It looks like the UK CAA regulations for the Drone Registration scheme (that started in November), are in line with the European requirements - but there seems to be a much more confusing set of regulations about to come into force in July 2020, that classifies drones according to weight and capability, and also classifies the kind of recreational and commercial flying that those drones / Owners are able to do ...
This is an article to explain the new EU and EASA drone regulations. The article will address the the open and specific categories as well as the SORA.