Many of those Pubs in Middlesex may already be listed as part of London, for instance in Stoke Newington. The listings here are a little out of date; and the Middlesex pub history section is to be remodelled on the later directory in 1926 and 1937. The Middlesex section is largely listed by Directories rather than census, therefore many pubs in the Hillingdon census may be listed under Uxbridge, Cowley or West Drayton / Yiewsley.
Acton, Ashford, Barnet, Bedfont & Hatton, Brentford,
Chiswick, Cowley, Cranford, Cricklewood, Crouch End,
Ealing, Edgware, Edmonton , Enfield (Ponders End),
Feltham, Finchley, Finsbury Park, Greenford,
Hampton, Hanwell, Hammersmith, Hampstead, Hanworth, Harefield, Harlesden (see Willesden) , Harlington, Harmondsworth, Harrow (includes Wembley, Sudbury, Alperton etc), Hatch End, Hayes (Southall), Hendon, Heston, Highgate, Hillingdon, Hornsey, Hounslow,
Kilburn , Kingsbury, Mill Hill, Muswell Hill,
New Southgate, Northolt, Palmers Green, Pinner, Potters Bar, Ruislip,
Shepperton , Southgate, South Mimms, Staines, Stanmore, Stanwell, Stoke Newington , Strand on the Green, Sunbury,
Teddington, Tottenham , Twickenham, Uxbridge,
West Drayton (including Yiewsley), Whetstone, Whitton, Willesden, Winchmore Hill, Wood Green
Here are listings for 1874 Pubs & Beer Retailers and 1899 Pubs ; plus the 1914 public houses and beer retailers
The Middlesex Genuki page was incredibly helpful in deciding where to list an area.