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Former Conservative MP Sarah Wollaston has joined the Liberal Democrats, saying "people wanted to see a unified force".

Her constituents voted for a "centrist" and are "horrified" that the Conservative Party has "shifted to the right", she told the Today programme.

Dr Wollaston was one of three Tory MPs to quit the party in February and join what would become Change UK, but she left that newly-formed party in June.

(Image: Sarah Wollaston, credit: Getty Images)