<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Jenbel:
But could kef0913 arrange in advance for a licenced cab/minicab which can take 6? I know I can do this in York, is it possible in London too?</font>
Many minicab companies offer multi-passenger vehicles. This forum has in the past had URLs for such services posted. The cost to the West End from LHR is almost certainly less than HEx + transfer from Paddington.