A BREXIT campaign chief has been nicked for masquerading as a diplomat on Foreign Office orders.

Leave.EU’s communications director Andy Wigmore was pulled over by cops in his car for using illegal diplomatic plates as well as an expired diplomatic ID card.

2 Andy Wigmore with Brexit bankroller Arron Banks, Donald Trump and Nigel Farage

The officers also suspected he was driving without insurance when he was detained on the A3 on January 19 last week.

Mr Wigmore is a key ally of Nigel Farage and one of the self-declared four “Bad Boys of Brexit”.

Wigmore was snapped with Farage when the former UKIP leader became the first British politician to meet Donald Trump after he was elected president in 2016.

The prominent campaigner, who has dual nationality with Belize, held diplomatic status for the tiny central American country until it was revoked a year ago.

2 Mr Wigmore, left, was caught driving with illegal plates

But Mr Wigmore kept up the pretence, angering the Belizean High Commission in London who asked FCO chiefs to enforce action to halt him.

The police patrol who spotted Mr Wigmore seized his diplomatic plates and ID card on the spot.

The arrest is a big embarrassment for Mr Wigmore and his boss, the multi-millionaire hard Brexit advocate Arron Banks.

It is a criminal offence to impersonate a diplomat, but Mr Wigmore insists he won’t be prosecuted.

After a long roadside row, he also insists he was able to prove he was insured to drive.

Confronted by The Sun, Mr Wigmore admitted last night: “It’s very embarrassing, but it was all just an administrative error.

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“I was unaware my number plates had been decommissioned.”

Mr Banks founded the Leave.EU campaign, which fought a bitterly rivalry with Vote Leave, fronted by Boris Johnson.

A Foreign Office spokesman said: “Former diplomats would be treated by the police in exactly the same way as any other member of the public”.