foxmoth, no, the MEF (which I stupidly called MSA) on the charts is highest obstacle + 300 feet.
I don't believe there is a legal requirement for MSA for VFR pilots - only IFR (which is 1,000 feet above the highest obstacle within 5 miles).
From a CAA Safety Sense VFR Navigation leaflet:
Identify high ground from the spot heights and contours and remember that the highest point en-route is often the top of an obstruction. Calculate and note the minimum altitude you can safely fly each leg.