Watch out for confusion between CAA and Jepp VFR GPS Charts. Former give MEF figures so - as otehrs have explained - you need to add VFR or IFR safety margins. Jepps already include a 1000ft margin.
In my view this lack of standardisation is very unclever as it could lead to a critical misjudgement. Consider coming back from the continent with Jepp charts on a long flight, reverting to CAA charts on entry to UK airspace then encountering low vis/cloudbase and being a bit tired and who knows how it might end.