Airport operator BAA has unveiled plans to build a sixth terminal at Heathrow Airport, in order to support the proposed third runway.

The plan would mean the demolition of 700 houses to make way for the runway and the new terminal.

However hundreds of residents have already slammed the plan and said it confirmed their fears that the massive Terminal 5 project, which will be finished in 2008, would not be the last to be built at Heathrow.

The third runway will be built between 2015 and 2020 on the condition that BAA is able to meet new limits on pollution. If expansion goes ahead, the villages of Sipson, Harmondsworth and Harlington will be affected.

Plans for a third runway were given the conditional go-ahead by transport secretary Alistair Darling almost a year ago.

Mick Temple, managing director for BAA Heathrow, said Heathrow needed modernising.