ii. 20 hours of VFR cross-country flight time as
Pilot-in-Command, including a cross-country
flight totalling at least 540 km (300 nm) in the
course of which full-stop landings at two
aerodromes different from the aerodromes of
departure shall be made.
That's pasted from LASORS. When I did mine two years ago quite a few people contradicted each other with "requirements". I took the approach of flying as near as possible to an Isosceles or Equilateral triangle, so CAA wouldn't find some reason to question it. (I wouldn't recommend flying 50 miles south, 100 miles north, than 50 south to base if you know what I mean.) That said the paragraph in LASORS is brief. Good luck.