Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex.
Rotherhithe index
This is not the Halfway House.
Historical London public houses, Taverns, Inns, Beer Houses and Hotels.
Residents at this address.
1881/Edwin Jno Seager/Beer Retailer/50/Hammersmith, Middlesex/Census
1881/Sophia Seager/Wife/53/Gt Witchenham, Norfolk/Census