Minimum Height
Yes, EASA SERA has a blanket not below 150m/500' with a few specified exceptions.
However the UK CAA have issued an exemption to this (and other SERA low flying stuff) in ORS4 No.1124. This keeps us where we were with the ANO rule 5, that is, as low as you think safe, but 500' slant from any person, vehicle, vessel or structure.