20 June 1837: Queen Victoria's accession
20 June 1911: Britain's first trolley bus service
20 June 1988: Cliff Michelmore combs the calendar to question Molly Weir , Adrian Love
Hilary O'Neil and Simon Groom on the people, events and music of 20 June in years gone by. Written by ROB METCALFE Producer DLRK MAGGS