Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex.
Kensington pub index
The earlier correct address is actually 3 Portland place, Pottery lane, in the 1871 and 1881 census and is not numbered in the directory. The 1906 compensation names a public house, the Queens Head, at 40 Pottery lane, which is probably correct. This is on the east side near St Johns place.
A listing of historical London public houses, Taverns, Inns, Beer Houses and Hotels in Kensington, London.
Residents at this address
1856/Rd Clark Wright/Beer Retailer/../../Post Office
1871/Joshua Thomas/Beer House Keeper/47/Rocke, Cornwall/Census
1871/Jane Thomas/Wife, Assistant/46/Fowey, Cornwall/Census
1871/John Thomas/Son/7/St Austell, Cornwall/Census
1871/Mary Mason/Cousin/10/St Germain, Cornwall/Census
1871/William Pridham/Lodger, Shoe Maker/37/Dawlish, Devon/Census
1871/Joseph Coomes/Lodger, Butcher/21/Kenton, Devon/Census
1881/Joshua Thomas/Landlord Of Beer House/58/Cornwall/Census
1881/Richard Thomas/Son, General Labourer/27/Cornwall/Census
1881/John Thomas/Son, Shop Boy/17/Cornwall/Census
1881/Charles Thomas/Son, Shop Boy/15/Cornwall/Census
1881/Geo Druce/Lodger, Labourer/33/Kensington, Middlesex/Census
1881/Chas Summer/Lodger, Labourer/29/Kensington, Middlesex/Census
1882/Joshua Thomas/Beer Retailer/../../Post Office Directory
1891/Joshua Thomas, Beer Retailer, Pottery Lane, Notting Hill W/../../Post Office Directory
1905/Frederic Ball, Beer Retailer, 40 Pottery Lane, Notting Hill W/../../Post Office Directory
London Evening Standard 06 June 1906
Licensing Act 1904 Notice of principal meeting to discuss by the Compensation authority on the 2nd day of July 1906.
Queens Head, 40 Pottery lane, Beer and wine on, Frederick George Hall
** Provided By Stephen Harris