Help needed

Probably the most famous pub near Broadcasting House in London is The George. In the postwar years it was known as "The Gluepot" for many who gathered there, either because they had work at the BBC, or because they'd finished work at the BBC, or they hoped to have work at the BBC, or they were avoiding work at the BBC.  You might see John Ireland, Alan Rawsthorne, Dylan Thomas, William Walton, Louis MacNiece, Constant Lambert, Humphrey Searle and more.

A little further off the beaten track is The Yorkshire Grey, in Langham Street. Its competitive pricing policy over the years (and a relaxed attitude to late licensing hours in the 70s and 80s) established it as a venue for BBC staff of a less stellar reputation; it's code was YG1, mimicking BH studio numbering.  Now, in a world of envy, we'd like to beef up its history, ideally beyond that of The George. So far we have established that Arthur Rimbaud and Ezra Pound were customers. It's likely that Rimbaud's chum, Verlaine [Paul, not Tom] popped in for a tincture or two. 

But are there more ?  Doris Lessing lived at 25 Langham street from 1959 to 1963 - did she like at bottle of brown ?  And when did the pub first open ?  Surely not when Boswell lived in Great Portland Street (1740-1795) ? Or when Langham St was still Queen Anne Street East, home to Edwin Landseer in 1802 ? 

This is a race. Other pubs are on the history kick.  The Manic Street Preachers played their first London gig upstairs at The Horse and Groom, on Great Portland Street.  Bob Dylan's London debut was at The King & Queen, at the far end of Foley Street.   All leads on former top-notch denizens of The Yorkshire Grey most welcome.