I have found Ann S Gunnell and Wm Ham in 1881 - living in Kensington - he is a coachman.
Perhaps Ann was a servant at Lattimer House prior to marriage and that is how they met.
1881 Census 58 Pembroke Road, Kensington
William Ham, bc 1856, Worldham, Hampshire, coachman
Ann S Ham, wife bc 1840, Brantford, Midddlesex
Elizabeth J Ham, bc 1870, Brentford
William Ham, bc 1875, Hammersmith
John Ham bc 1878, Hamersmith
Louisa (no date given for birth), b Kensington