Aviation News – Heathrow Airport has revealed its latest plans for a major expansion, including the long-anticipated third runway, officially referred to as the North-Western Runway. Construction of the runway itself is projected to cost around £21 billion, marking a significant rise from earlier estimates of £14 billion due to inflation and rising construction expenses. Alongside this addition, a suite of new infrastructure developments is in the pipeline, including Terminal T5X, an expanded Terminal 2, and the creation of three new satellite terminals aimed at significantly boosting capacity. Building the new terminal would be £12bn and modernising the current airport’s infrastructure £15bn. Due to rounding, it will total £49bn.
As part of the broader scheme, a section of the M25 motorway will be diverted to accommodate the airport’s growth, a move that has sparked concerns among local residents and environmental groups. The motorway, one of the UK’s busiest transport arteries, would need to be rerouted through a tunnel under the new runway — a complex and costly engineering feat.
A map shows where the new terminal complex T5X, consisting of terminals called T5XN and T5XW terminals, and the third runway would be built if Heathrow’s plan is chosen (Picture: Heathrow)
The project’s total cost is expected to run into the tens of billions of pounds, though Heathrow has yet to confirm an exact figure. This has raised questions about who will ultimately bear the financial burden: the airport’s operators, the airlines, or passengers.
While Heathrow argues that the expansion is vital for maintaining the UK’s position as a global aviation hub, local communities have expressed frustration, citing increased noise, air pollution, and disruption. Campaign groups continue to voice strong opposition, highlighting environmental concerns and the impact on nearby homes and greenbelt land.
The proposed Terminal T5X will serve as an extension of the existing Terminal 5 complex, streamlining operations and accommodating increased passenger numbers. At the same time, Terminal 2 is set to grow, with enhanced facilities and added gates to serve more international routes.
If approved, construction could begin in the coming years, though the timeline is still subject to planning permissions and potential legal challenges.
Photo Rob Vogelaar
