Footage of damaged caused by a bomb on a canal bridge in North London.
Footage of the destruction casued by bomb explosion on Hammersmith Bridge, London.
Footage of the damage caused by a bomb blast in Piccadilly, London.
Footage of bomb damage at Leicester Square and Tottenham Court Road in London - possible IRA attack.
Bombs explode and fires start in the troubles in Northern Ireland.
City workers interviewed about new threat of letter bombs - news report.
Interview with IRA leader Sean MacStiofain.