Public sector strike could see Heathrow 'grind to halt'

Heathrow airport has asked airlines to halve the number of passengers they fly into the airport next week to try to minimise disruption caused by a strike.

Its operator BAA warned of "gridlock" and said passengers could face 12-hour delays on Wednesday when immigration officers go on strike over pensions.

BAA said it was holding talks with airlines and the UK Border Agency.

PM David Cameron said it was clear there would be an impact at ports and airports, but that borders would be secure.

Richard Lister reports.