Thanks for that, LASORS refered me to FCL1 1.125 for the "definition", which I think is maybe in section 2.
including a VFR cross-country flight totalling at least 540 km (300 NM) in the course of which full stop landings at two different aerodromes from the aerodrome of departure shall be made
This seems open to interpretation...If you flew 150 miles, landed, had a few days holiday in your destination and then flew back. Would that count?
What about if you flew to your 150 mile destination stayed a few days, did a short sightseeing flight and then flew home....would that count?