London Transport 's low - cost subsidiary Harrow Buses leased 29 new MkII Metrobuses in 1987 .
London Transport 's low - cost subsidiary Harrow Buses had to return them to their lessor three years later .
London Transport 's low - cost subsidiary Harrow Buses leased 29 new MkII Metrobuses in 1987 , but had to return them to their lessor three years later .