File photo dated 10/03/16 of Theresa May's infrastructure tsar Lord Adonis. who has quit, delivering a scathing verdict on the Prime Minister's approach to Brexit. PRESS ASSOCIATION Photo. Issue date: Friday December 29, 2017. Europhile Labour peer Lord Adonis resigned as chairman of the National Infrastructure Commission, claiming Mrs May had become the "voice of Ukip" and the "extreme" right-wing of her party. See PA story POLITICS Adonis. Photo credit should read: Yui Mok/PA Wire

Labour peer Lord Adonis – a high-profile campaigner against Brexit – claimed Mrs May had sided with Ukip and the “Tory hard right”.

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