FREE now SUBSCRIBE Invalid email Make the most of your money by signing up to our newsletter fornow We will use your email address only for sending you newsletters. Please see our Privacy Notice for details of your data protection rights.

The Ukip leader's warning comes as a growing number of voices in Westminster have made moves to push the case to keep Britain in the European single market. During his weekend radio show on LBC, Mr Farage claimed the "the political establishment is ganging up together to betray Brexit voters". In just the past few days, Lord Mandelson, Tony Blair and Nick Clegg have declared their intentions to stop Brexit from cutting off ties with the EU.

GETTY•IG Nigel Farage fears an establishment stitch up over Brexit

The political establishment is ganging up together to betray Brexit voters Nigel Farage

Mr Farage said: "Lord Mandelson, the cheerleader in chief, is trying to get us to stay in the single market." The MEP, who campaigned prominently for the Leave campaign, told his LBC audience: "If Brexit doesn't happen, there is going to be political anger that has never been seen in this country." He responded to Diana, from Putney, who called in to voice her frustration at the growing betrayal campaign. She told him: "There is a ridiculous argument that we know what we’re going to get if we stay in the EU. We don’t! "And the bits we do know about are not what we want."

GETTY Theresa May has promised to trigger Article 50 by March next year

Mr Farage added: "Well, we do know that they want a European Army, they want everyone to join Euro, they want Turkey to join. "Who knows where the EU will be in two or three years, especially if they have another crisis in the Eurozone." Fear and anger among Brexit voters were prompted after leading figures in Westminster revealed their plan to force the UK to remain within the customs union. Following Nissan's announcement to produce more car models at their Sunderland plant, former Lib Dem MP Vince Cable claimed that the Government's "assurances to Nissan" mean the UK will stay in the customs union.

Sir Vince, a former Lib Dem MP said that Theresa May’s pledge to Nissan that the car industry will remain competitive after Brexit signals a promise that the UK will be staying in the EU customs union. Membership of the customs union would likely mean that the UK could not strike its own independent trade deals. The Government and Nissan have said there was no "sweetheart deal" but refused to deny a written guarantee was offered that gave assurances the company would not be disadvantaged by the Brexit negotiations. Sir Vince added: "The only way these big supply chain companies are going to commit themselves to Britain – and Nissan is the biggest – is that if they give them guarantees they are not going to be caught up in rules of origin problems, which is what happens if you leave the customs union. "And if you stay in the customs union, which I think is what we’re talking about, what is the role of Dr Fox? Because it means you no longer have an independent trade policy."

GETTY Brexit Secretary David Davis is one of the three leading cabinet voices on Brexit