The former UKIP leader, who left the party after Britain voted to leave the EU, said he will return to politics to finish off what he started, unless the PM drops her “Brexit betrayal” plan.
After 25 years of campaigning to leave the EU, he can see the goal he fought for – and thought he had won after the 2016 referendum – slipping through his fingers.
Farage stated: “If I have to step back into the fray and do it all again I shall.
“If we do not get a proper Brexit in any way at all, I will be forced to do something again. There are people sitting in the House of Commons who would regret that very bitterly.
“If I were to enter the political fray it would be the Tories who get hurt in the short term. They would be mullered. I don’t really want to. It’s not a decision I would take lightly or with any glee.
I’m enjoying myself, going to speak in America, popping over to Brussels, doing a programme on LBC…I’m enjoying myself.
“But this time there would be no more Mr Nice Guy. I would knock their legs from underneath them.”
Nigel admits he can feel frustration welling up inside him and is already considering his options – either a return to run Ukip or launching a new party.
And he believes Mrs May’s plan must be stopped in its tracks – even if it risks leading to a second in-out vote.
Farage, 54, said: “I’ve been campaigning to leave the EU for a quarter of a century. I believe in it with all my heart and soul and gave up the best part of my adult life for it.
“But I’ve been watching recent events with growing dismay and I’m not the only one.
“Little old ladies grab my arm in the supermarket and ask ‘What’s going on? Is it going to happen?’ Well I will do my utmost to make damned sure it Brexit does happen.”