London produced a gritty display to pull off a shock 0-12 to 1-08 win against Mayo in their FBD League quarter-final clash at the University of Galway Connacht GAA Air Dome.
The Exiles will now face Roscommon in the semi-finals on Saturday night after a well-earned success.
Mayo manager Kevin McStay named seven debutants in his starting 15, with just three of the team that faced Dublin in last summer's All-Ireland SFC quarter-final getting the nod: Eoghan McLaughlin, Jordan Flynn and Tommy Conroy.
Rob Hennelly and Cillian O'Connor also started but they came unstuck against a hungry London outfit.
Mayo led by 0-06 to 0-05 at half-time, and though they were reeled in after the break, O'Connor's goal on the 50-minute mark nudged them ahead by a score.
However London - driven by the excellent Shay Rafter - kept plugging away to ultimately dig out a sweet victory.
Galway will meet Leitrim in the other semi-final.
Jim McGuinness made it two wins out of two in the Dr McKenna Cup as his Donegal side defeated Tyrone 0-15 to 1-10 at O'Neills Healy Park in Omagh.
Donegal were five points to the good at half-time, 0-09 to 0-04, but the home team reduced that deficit to just a point by the 45th minute as they reeled off four scores without reply.
It was nip and tuck until just before the hour mark when Ciaran Daly punched to the net to give Tyrone the lead, 1-10 to 0-12.
However Donegal produced a strong final ten minutes to take the victory.
In the same competition, Fermanagh edged past Antrim 1-10 to 1-09 in Ahoghill.
Benen Kelly found the net for Antrim in the 21st minute but Fermanagh took control and led by 1-06 to 1-02 at the break, with Lee Cullen bagging a goal on the stroke of half-time.
Fermanagh managed to keep their noses in front throughout the second period, with Oisin Doherty's late free for Antrim leaving the minimum between them.
In the Co-Op Superstores Munster Hurling League, Cork's clash with Limerick was postponed due to heavy fog in Mallow. A new date for the fixture has yet to be confirmed.
Waterford came out the right side of a good tussle with Tipperary, prevailing 1-22 to 1-20.
In the Walsh Cup, Westmeath's game against Antrim in Kinnegad was called off due to poor weather conditions, with the Carlow-Kilkenny match also scrapped. That game will be played on Tuesday in SETU, Carlow.
Meanwhile Galway's meeting with Offaly was postponed after 55 minutes due to fog. The Tribesmen were 4-15 to 1-11 ahead in Tullamore at that stage; a decision will be made on whether or not they will be awarded the win.
