The debate surrounding a third runway at Heathrow has stretched over three decades, with the Liberal Democrats opposing expansion due to overstated economic benefits and unavoidable environmental consequences. The current proposal is problematic, as costs have doubled and an additional 300,000 flights would hinder net zero targets. Despite this, on January 29, 2025, the Chancellor supported a third runway at Heathrow. Olney urges the Minister to base decisions on unbiased data rather than political expediency. She notes that the Department for Transport’s appraisal report shows a net present value ranging from £3.3 billion to minus £2.2 billion. With Heathrow already in debt, concerns remain about funding and private financing. Noise pollution impacts are severe, with 325,000 more people falling within significantly affected decibel levels. Olney also questions the economic case for expansion and highlights environmental challenges, including carbon emissions and air quality issues. She concludes by asking if Heathrow’s expansion can comply with net zero targets.