Tries from Peter Jorgensen, Fergus Pringle, Simon Webster and Alasdair Strokosch wrecked Leinster’s hopes of making it an Irish 1-2-3 at the top of the table.

Instead, Todd Blackadder’s men leapfrogged Ulster in the standings on foot of a dominant display at Donnybrook, where Leinster had only lost once in 14 previous games.

Without nine of their starters from last Sunday’s Heineken Cup win in Glasgow, Leinster struggled in the opening half.

Territorially, the Gunners were on top, although an opportunist try from Leinster captain Keith Gleeson left the Scots trailing 13-10 at the break.

The Gunners, showing eight enforced changes, went in front after 12 minutes when a sweeping backline move put Australia international Jorgensen in at the left corner.

Phil Godman, whose long skip pass carved out the opening, brilliantly drilled the conversion over from the touchline to make it 7-0.

Godman then screwed a 30metre penalty chance wide to the right and fly-half Brian O’Meara, making his 100th appearance for Leinster, regained the province’s composure with his first penalty success after 24 minutes.

O’Meara closed the gap further with his second penalty four minutes later.

Godman then punished Gleeson for a scrum infringement for a 10-6 lead but the Ireland flanker gained full revenge in first half injury time when he blocked a Godman clearance kick to gather and score Leinster’s only try.

O’Meara’s conversion handed Michael Cheika’s side a three-point buffer for the second half but their 13-10 lead was blown apart within 16 minutes of the second half.

First, lock Fergus Pringle loped over, beating two would-be tacklers, for a soft Edinburgh try after 52 minutes and Godman converted for 17-13.

Four minutes later left wing Webster scooted over past the weak challenge of Robert Kearney for his third try of the league campaign and a 22-13 lead.

Leinster’s chances of a revival were killed off as linchpin lock Ben Gissing was sin-binned for a punch on the hour and both O’Meara and his replacement Eoghan Hickey drifted a penalty kick apiece wide.

Godman also screwed a 70th-minute kick wide but Edinburgh were put out of sight when replacement flanker Strokosch bagged the bonus point try in injury-time.