'The Bristol Boycott & The Birth Of British Civil Rights' Paul Stephenson Interview
The company was confident it could maintain this discrimination, but with widespread support, a substantial part coming from Bristol's white residents, as well as the opposition leader - the future Labour PM Harold Wilson, the company backed down 60 days later - on 28th of August, the same day as Martin Luther made his 'I Have a Dream' speech.
Later Harold Wilson making good on his promises, enacting the first anti-discrination legislation in 1965. Here is Paul's 2013 BBC interview.