I've never so heard so much crap spoken on 121.5 as in the UK at the moment - I'm not past there often but have heard numerous weekend warriors bleating that they're "unsure of our position" - trollip! Learn to nav or buy a hundred buck GPS. 121.5 is for emergencies - keep it that way.
Yet again, a so called professional pilot displays ignorance of the air law covering airspace he operates in.
Learn the local air law or stay out of UK airspace - keep it that way.