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The Brexit vote can be reversed "in theory", a top EU official declared today.

Pierre Moscovici, European Commissioner for Economic Affairs, said it is up to the UK people whether to stick to the 2016 decision to leave.

The Frenchman spoke after the Superdry founder Julian Dunkerton donated £1million to the campaign for a second referendum on Brexit.

Asked if the Brexit vote could be reversed, Moscovici told France Inter radio: "It is, in theory.

"It is up to the British themselves who have made the decision to leave, to decide ultimately if they will or not, and how they will do it."

(Image: AFP) (Image: AFP)

However, he added: "The probability of Brexit is nevertheless very strong because there has been a vote of the people."

The campaign for a so-called 'People's Vote' on the UK's Brexit deal - with the option to stay in the EU - has gained momentum as the threat of no deal mounts.

(Image: Getty Images Europe)

Prime Minister Theresa May has until October to reach an agreement with the 27 EU member states but talks are still deadlocked over customs and the Irish border.

The UK government has ramped up preparations for a no deal Brexit - including stockpiling drugs - and will this week publish the first of 70 papers allowing businesses to prepare their own backup plans.

Asked if there would definitely be a Brexit deal, Moscovici warned: "Not necessarily."