Caractacus
To elaborate. In the BNN hold LTN is nearer than LHR. In the OCK hold LGW is approx the same distance if not closer than LHR. In the BIG hold ditto. In the LAM hold STN is nearer than LHR.
Same situation exists in the LANAK hold on the way to GLA - GLA, EDI and Prestwick are about equidistant.