It's 50 years since Martin Luther King's 'I have a dream' speech - and here, it's fifty years since campaigners won their fight against the racist rules of a bus company.
On August 28th 1963 the Bristol Omnibus Company stopped its ban on black and Asian workers.
But how much have attitudes really changed? Robert Murphy reports:
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Elizabeth Martin was walking her pet chihuahua on a lead when they were set upon by a wolf-like dog.
Organisers MTV and Plymouth City Council are asking everyone to make sure they plan ahead for a fun, safe and hassle-free event.
It will be a bright start to the day with some showers. There will be a breeze.