Heathrow Airport has unveiled an ambitious £49bn expansion plan, including a new third runway, a day after the government's proposal submission deadline. The project aims to significantly increase capacity to meet urgent demand, but faces strong opposition from environmental groups, politicians, and local residents.

• The proposed North-Western Runway would be 3,500m long, boosting capacity to 756,000 flights and 150m passengers annually from the current 84m.
• Thomas Woldbye, CEO of Heathrow Airport, stated the expansion is "urgent" and will be funded by private finance, despite environmental concerns.
• The plans include a new T5X terminal, expansions to Terminal 2, and the diversion of the M25 motorway, costing £21bn for the runway and land acquisition alone.