Join Date: Oct 2006
Location: London, UK
Programs: BA Gold, VS Silver, SQ Silver, IHG Plat Amb, Hilton Gold, Marriott Plat, Accor Silver, Radisson Prem
Posts: 16,872
There shouldn't be much of a queue at all - there rarely is at busy times and after 10pm is pretty quiet.
I would look into using your hotel's car service if possible as it may be cheaper than a black cab (which is around £60 at night).