Former Conservative Party chair Baroness Sayeeda Warsi has defected from the Leave campaign and opted for Britain to remain within the EU.
She cited "hate and xenophobia" as the reasons for changing her position.
Her decision came after she saw Nigel Farage's controversial 'breaking point' poster, which was widely criticised for being xenophobic -- Chancellor George Osborne said it had echoes of 1930s propaganda.
Ms Warsi told The Times the poster was "the breaking point to say 'I can't go on supporting this'".
“Are we prepared to tell lies, to spread hate and xenophobia just to win a campaign? For me that’s a step too far.”
Echoing the sentiment of the Prime Minister's impassioned appearance on Question Time, she also accused leading Brexit campaigner Michael Gove of promoting "complete lies".
I am so delighted that Baroness Warsi has done this. She is a Conservative politician I deeply admire and one of the best examples of a patriotic British Muslim.