Directions to BTG in Europe By air   Arriving at Heathrow Airport Using London Underground, travel on the Central line to St. Paul's station. BTG is a five minute walk from the station. Or take the Heathrow Express train to London Paddington and then, using London Underground, travel on the Central line to St. Paul's station. BTG is a five minute walk from the station. Arriving at Gatwick Airport Take the Thameslink train to City Thameslink station. BTG is a two minute walk from the station. By rail   When arriving in London by train, use the Central line on the London Underground to travel to St. Paul's station. BTG is a five minute walk from the station. By road   Park in the NCP car park in Limeburner Lane. Fleet Place is immediately opposite the car park.