Week in pictures: London

1 of 5 Is it art?: A graffiti artist sticks one of his pictures up in the Tate Britain to highlight the UK "obsession" with crime

2 of 5 Walk out: Up to 90,000 postal and council workers go on strike over cost-of-living allowances

3 of 5 Sunny outlook: The latest installation at the Tate Modern looks at the British obsession with the weather

4 of 5 Dumping ground: London gets a £13.4m boost to rid its streets of dumped cars

5 of 5 Food fight: Costumed protesters against genetically modified crops march to Downing Street