Leinster book Champions Cup final berth with win over Northampton

The repeat of the 2011 final was a mismatch for the first hour with wing James Lowe running in a hat-trick against the Gallagher Premiership leaders, who suffered from a high error count.A 82,300 capacity crowd in Dublin watched the first England club to play at the home of Gaelic sport fire few shots until George Hendy crossed to give them hope of an upset.Northampton then began to look more like the daredevil side that has taken the Premiership by storm this season and, when Tom Seabrook touched down with six minutes remaining, they had Leinster on the ropes.But the four-time champions…