An eye witness, Sophie Burnett said:
"The fire began around 12 o'clock, they began by shutting the shops closest like Boots and M&S, they then evacuated the whole of North Terminal Landside and have stopped all publicly transport coming over to the terminal including the shuttle and the public bus services.
"They're currently trying to isolate the smoke from the building."
More top news
A former Gurkha soldier who lost a leg in Afghanistan has raised over £10,000 for charity - by climbing to Mount Everest's base camp.
James has this evening's forecast for the east of the region.
The forecast for the west from James Wright.