Bennett introduced one-man operation to buses in Manchester and London and promoted London Underground's extension of the Piccadilly line to Heathrow Airport and the construction of the Jubilee line.
He introduced one-man operation on buses for the first time in 1966, commissioning the Mancunian double-decker bus for this purpose and reforming the fare collection system.
[2] In 1968, Bennett joined the London Transport Board and served as a member of this until 1970 and then of its successor, the London Transport Executive (LTE), until 1980; being its deputy chairman from 1971 to 1978 and its chairman from 1978 to 1980.
[1] As in Manchester, he introduced one-man operation on buses and simplified the fare system, though he retained conductors and Routemaster buses for operations on busy central London routes.
[2] Following a controversy over managerial waste and a critical report by management consultants commissioned by the Greater London Council, that advised that the LTE's senior management lacked the skills needed to manage the organisation, Bennett was dismissed as the chairman three years before the end of his term of office.