At the UK Government’s request Heathrow Airport has today (1st August) submitted plans for a 3rd runway that would result in 750 more planes a day using the airport and which would cost over £20bn with another £12bn to upgrade Terminal 5. The Government will respond in the Autumn.

https://www.theguardian.com/environment/2025/aug/01/heathrow-submits-shovel-ready-plans-for-third-runway