From Stansted Airport train to Liverpool Street Underground Station then Tube to Lancaster Gate Underground Station. 1hrs 02min £26. From London Stansted bus to Victoria, Grosvenor Gardens (SW1) then line 148 bus to Bayswater, Leinster Terrace (W2). 1hrs 31min £11. From Stansted Airport, Coach Station bus to Mayfair, Marble Arch (W1). 1hrs 15min £8. From London Stansted taxi to Kensington Gardens. 1hrs 09min £125.