Yes, London Heathrow Airport, including Terminal 2, is located entirely within the Ultra Low Emission Zone (ULEZ). This high-fidelity environmental zone was expanded in August 2023 to cover all London boroughs, including the Hillingdon area where Heathrow resides. In 2026, if you drive a vehicle to Terminal 2 that does not meet specific "High-Fidelity" emission standards—generally Euro 4 for petrol and Euro 6 for diesel—you are required to pay a daily charge of £12.50. This charge applies 24 hours a day, midnight to midnight, every day of the year except Christmas Day. It is a high-fidelity necessity for travelers to check their vehicle's compliance on the Transport for London (TfL) website before arrival. Notably, the ULEZ charge is separate from any "Terminal Drop-Off Charge" of £5, meaning an older, non-compliant vehicle could cost a driver £17.50 just for a quick drop-off. Failure to pay the ULEZ fee can result in a significant Penalty Charge Notice (PCN), making public transport options like the Elizabeth Line or Heathrow Express a much more cost-effective high-fidelity alternative for many.