THERESA MAY claimed today her policy on post-Brexit customs arrangements was “evolving” after critics said she had been “held hostage” by her own Cabinet over the existing plans.

The Prime Minister spoke ahead of a meeting of her Brexit “war Cabinet” after senior ministers made clear their deep divisions over two options currently on the table regarding the customs union and the Irish border.

Around 60 anti-EU Tory backbenchers, led by Jacob Rees-Mogg, have put their name to a report by the European Research Group that rejects both plans.