The game at a glance
Man of the match: Paul Geraghty (London):The Galway man's fielding of high balls was a joy to watch and he fired home the opening goal.
Extra-time was a step too far for London. Mayo found more space and Andy Moran found his shooting boots.
Mayo's conversion rate from frees was shocking. They went through five different free-takers over the 90 minutes.
Michael Collins had a decent day and was spot on with the penalty award.
What they said
James Horan (Mayo manager):
"Two minutes to go and two points down, it wasn't looking good. We played in fits and starts and made an awful lot of wrong decisions today, but we stuck at it and hopefully we kick on from here."
Paul Coggins (London manager):
"There is no question whatsoever that this team will stay together for the qualifiers. That game will have done us so much good. We're going to give it a great blast."
Wides: Mayo (7) (15) 18; London (5) (8) 9
Frees: Mayo (16) (29) 34; London (12) (23) 30
Yellow cards: Mayo 1 (A Dillon 12); London 3 (M Moloney 11, S McVeigh 27, S Kelly 61)
Mayo will face Galway in Castlebar on June 26 for a Connacht final spot. It's the qualifiers for London on June 25.