Erm, thats the requirements for the issue of a PPL(A). Nothing to do with what constitutes cross country flying.......
Cross-country flight during PPL training and post PPL training is the same.
E.g, a round trip flight (EGNT => EGPK => EGNM => EGNT, 360NM) performed during PPL training as cross-country flight is also logged as such if performed post PPL training.
So 50 hours post-licence, suitably annotated in your logbook as "cross-country" should do the trick, although perhaps it might be wise (and less boring) if you threw in an away-landing or two.
When it comes to aviation though, there is no trick.
Cross-country flights must be correctly performed and the logbook entries appropriately noted as required. No need for any tricks.
If you depart EGNT and perform a couple of circuit patterns with several landings at EGNT, that is not a cross-country flight and must not be logged as such.
Also if you fly from EGNT to Tees-Side NDB and back to EGNT, that's not a cross-country flight.
WP