A massive car bomb that injured seven people when it rocked London will strengthen resolve to achieve a Northern Ireland peace deal, politicians on all sides said today.

Police investigating a terrorist bomb blast at a postal depot in London today revisited the scene in a bid to unearth new clues.

Tony Blair is to tell his ministers the forthcoming election battle will need ‘‘even more energy and focus than the 1997 campaign’’.

No warning was issued before Saturday night's blast at a Post Office delivery depot in north London, but is believed to be the work of the Real IRA.

Forensic experts are carrying out a fingertip search of a postal sorting office where a suspected terrorist bomb exploded.

Police say it is unlikely that an Irish terrorist responsible for the BBC Television Centre bombing was involved in a road rage incident before the explosion as originally thought.

A terrorist who planted a bomb in a taxi outside BBC Television Centre may have been involved in a road rage incident shortly before the explosion.

The bomb which exploded outside BBC Television Centre is being linked with three previous attacks believed to be the work of the Real IRA.

British anti-terrorist police are investigating a possible link between last night’s car bomb at the BBC Television Centre and the networks decision to name suspects for the Omagh atrocity.