Their critics accuse them of wearing tin-foil hats and being paranoid that everyone is out to get them.

Now it appears that leading Brexiteers are turning to the humble microwave oven to protect them from bugging by the security services. A senior member of the European Research Group is urging his colleagues to buy microwaves for their offices to protect them from eavesdropping.

Eurosceptic MPs have been advised to place their mobile phones inside the microwaves during sensitive meetings to deter hi-tech surveillance, while being cautioned that turning on the miniature oven is not recommended.

A Conservative MP, who has been advised to buy a microwave for her office, told The Sunday Times: “Those MPs who have served in government know that it’s possible for