James Hynes’ tidy 16th minute goal put Sligo 1-5 to 0-2 clear and they led 1-7 to 0-4 at half-time as newcomer Niall Murphy, who hit three second-half points, made an impressive senior debut.
Four of London’s starting 15 that lost to IT Sligo the night before began against Kevin Walsh’s charges.
Scorers for Sligo: C McGee 0-6 (2fs), J Hynes 1-2, M Breheny 0-4 (2fs), N Murphy 0-3, A Costello, P McGovern 0-1 each.
Scorers for London: L Colfer (3fs), F Niblock 0-3 each, P McGoldrick 0-2, S McVeigh 0-1.
SLIGO: B McGovern; N Ewing, J Martyn, K Cawley; P McGovern, N McGuire, M Quinn; T Taylor, J Clarke; A Costello, M Breheny, J Hynes; C McGee, F Quinn, N Murphy.
Subs: P Greene for McGovern (ht), E Mullen for Taylor (53), V Frizzell for Hynes (55), P Hughes for Quinn (57), D Rooney for Cawley (inj. 60).
LONDON: S Howard; M Keane, S McVeigh, D McGreevy; S Doolan, B Comer, D McHugh; D Hagan, L Mulvey; C Colhoun, C O’Sullivan, L Colfer; H Gaughan, F Niblock, E Mageean.
Subs: S Hickey for Mageean (25), B Kerr for McHugh (25), A Concannon for Mulvey (blood, 30), N Burke for McGreevy (34), C McCallion for Colhoun (48), P McGoldrick for Gaughan (49).
Referee: P Neiland (Roscommon).