So this must be the family in 1871 and their surname is Sandison:
https://www.ancestry.co.uk/interacti...nSearchResults
10 Tufton St, Westminster
John Sandison Head Mar 54 Clicker St Martin in the Fields
Mary A Do Wife Mar 52 Boot Binder Westminster St Margarets
George Do Son Unm 26 French Polisher Do St Johns
plus six other children (let me know if you need their details).