Hello Nigel
It's St John Horselydown, Southwark........
Not your Bonner's but could be part of the family?
1851
9 Carlton Square, St Pauls Deptford, Kent
Richard Bonner head 28 managing clerk to AH? St Pancras, Middlesex
Mary Ann " wife 28 St Martins in the fields, Middx
Aubrey " son 7 St Mary, Islington
Horace " " 3 Dartford, Kent
Arthur " " 1 Blackheath, "
Ellen Leary servant 19 house servant Ireland
J Adams visitor (unm)31 managing clerk to AH? St Pancras, Middlesex
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Regards
Bryant