Heathrow fire LIVE: Terminal 3 car park in flames as black smoke spotted over airport

A Heathrow Airport multi-storey car park has burst into flames.

Four fire engines and over 20 firefighters have rushed to the scene to tackle the blaze, which involved a diesel vehile catching light.

Footage from the airport's terminal 3 car park shows smoke billowing out of the building and orange flames leaping around it.

THIS IS A LIVE BLOG. FOLLOW BELOW FOR UPDATES.