1. The business mainly operates in London, UK, providing high-speed direct train service between Heathrow Airport and London Paddington Station. 2. In the travel/transport sector, it is a leading brand in airport ground transportation services. Competitors include alternative transport options to Heathrow Express, such as the Underground, taxis, and other airport express services. 3. The official website brand terms are "Heathrow Express" or "希斯罗快线".