Midway through the first half Antrim led 0-5 to 0-1 but the Exiles rallied and trailed 0-6 to 0-5 at the break.
Antrim opened up a six-point gap early in the second half and, although reduced to 14 men when Noel McDonald received a straight red, goals from Martin Duggan and Kevin Walsh put two between the sides. However, Antrim added six points without reply to seal victory.
Scorers for Antrim: P Shiels (1-10, 4fs, 1 65), C Clarke (0-3, 1f), N McManus, E Campbell, Conor Johnston, S McAfee (0-1).
Scorers for London: E Kelly (0-5, 3fs, 2 65s), K Walsh, M Duggan (1-0 each), D Moore, P Phelan (0-1 each).
ANTRIM: C O’Connell; O McFadden, C McKinley, A Graffin, S McCrory, N McAuley, N McManus; E Campbell, Ciaran Johnston; C Carson, D Hamill, C McCann; C Clarke, P Shiels, PJ O’Connell. Subs: B McFall for S McCrory, Conor Johnston for D Hamill, S McAfee for C McCann, T McCann for C Carson, M Bradley for E Campbell.
LONDON: J Barrett; C McAlinden, R Foy, N McDonald; E Cooney, PJ Rowe, S Fawley; D Moore, H Vaughan; P Phelan, E Kelly, M Lynch; K Walsh, M Duggan, L Hands.
Subs: K Killilea for L Hands, P Cocoman for P Phelan, D Egan for M Lynch.
Referee: J Keenan (Wicklow).