SRD
Yes, EASA SERA has a blanket not below 150m/500' with a few specified exceptions.
However, as Heston says, the UK CAA have issued an exemption to this (and other SERA low flying stuff), you can find it in 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.