All Bar One, Westminster

[ETA]

All Bar One (http://www.pubsgalore.co.uk/pubs/82210/)

Just a minor point, as it makes no difference to finding the pub, but according to the pub's website, the correct address is 62 Buckingham Gate, same postcode.

[Dave M]

Very confusing one this. OB points out here that 62 Buckingham Gate doesn't seem to be right http://forums.pubsgalore.co.uk/showthread.php?19744-RE-All-Bar-One-Westminster

Official website now says 58 Victoria Street, that being the case they have their own postcode wrong and it should be SW1E 6QW