Week in pictures: London

1 of 5 Poll upset: The Liberal Democrats snatch the Labour safe seat of Brent East in a by-election

2 of 5 Memorial service: A garden is opened on the sixth anniversary of the Southall rail crash

3 of 5 Off track: The 0700 GNER service to Glasgow comes off the rails as it pulls out of King's Cross

4 of 5 Gunned down: A seven-year-old girl is shot in the back by her father's killer

5 of 5 High and dry: Thousands of south-east London residents have no water after several water mains burst