We'll get a look inside Heathrow's new Terminal 2 later. The £2.5b renovation project should be finished by June.
There'll be more natural light and partner airlines will be closer together to improve flight connections. Airport bosses say they're determined not to have a repeat of the chaos when Terminal 5 opened six years ago - with bags lost and long delays.
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Monday's weather forecast for the east of the region
Monday's weather forecast for the west of the region
Monday's weather for the east of the region