It was rebuilt in the 20th century around the corner from its original site - hence the different address.
A listing of historical London public houses, Taverns, Inns, Beer Houses and Hotels in St Marylebone, London. The St Marylebone, London listing uses information from census, Trade Directories and History to add licensees, bar staff, Lodgers and Visitors.

Allsop Arms, 137 Gloucester Place - in February 2007
Kindly provided by Stephen Harris
The following entries are in this format:
Year/Publican or other Resident/Relationship to Head and or Occupation/Age/Where Born/Source.
1869/Wm Ratcliffe/../../../Post Office Directory ****
1881/Henry L Slight/Licensed Victualler/42/St Marys, Nottingham/Census ****
1881/Emma Slight/Wife/43/Cross, Somerset/Census
1881/Flora Slight/Daughter/16/Paddington, Middlesex/Census
1881/Edith E Slight/Daughter/15/Paddington, Middlesex/Census
1881/Harold J Slight/Son/14/Paddington, Middlesex/Census
1881/Herbert Slight/Son/7/St Pancras, Middlesex/Census
1881/Marguerite Slight/Daughter/9 months/Marylebone, Middlesex/Census
1881/Emma A Rooks/Barmaid/24/St Columb, Cornwall/Census
1881/Emma Stevenson/Barmaid/18/Cranworth, Norfolk/Census
1881/Rose H Rowles/General Servant/20/The Tower, Middlesex/Census
1882/Henry Leeson Slight/../../../Post Office Directory ****
1884/Henry L Slight/../../../Post Office Directory ****
1891/Hy Leeson Slight/../../../Post Office Directory ****
1895/Alf C Stock & Co../../../Post Office Directory ****
1910/Albert Stops/../../../Post Office Directory ****
1915/Richard Stiles Allen/../../../Post Office Directory ****
1934/Allens (Caterers) Ltd/../../../Kellys Directory ****
1938/Allens (Caterers) Ltd/../../../Post Office Directory ****
** Provided By Stephen Harris
**** Provided By Kevan