Israel has shown Britain secret files said to prove Iran wanted to build a nuclear bomb as it bids to kill off the international deal with Tehran.

Evidence shared with the UK is said to include a memo handing responsibility for enriching weapons-grade uranium to the Iranian defence ministry.

The material was part of a haul of 100,000 files snatched by the Israeli security service Mossad from a Tehran warehouse in January, according to the Times.

Israel's PM Binyamin Netanyahu is planning to use the fruits of the audacious raid to undermine support for the nuclear deal struck in 2015, which eased sanctions in return for a halt to weapons development.

He will press the case for abandoning the pact when he meets Theresa May in Downing Street during a trip to Europe on Wednesday.

Israel's PM Binyamin Netanyahu (pictured) is planning to use the fruits of the audacious raid to undermine support for the nuclear deal struck in 2015

Theresa May (pictured on the way to church in her Maidenhead constituency with husband Philip yesterday) has reiterated her commitment to the Iran nuclear deal

Donald Trump has already declared that the US will withdraw from the pact and threatened sanctions on businesses that continue to trade with the regime.

However, the EU has vowed to save the agreement, saying it still represents the best chance of preventing Iran from developing nuclear weapons.

Mrs May yesterday reiterated her 'commitment' to the Iran deal in a phone call with Saudi Arabian Crown Prince Mohammed bin Salman.

Mr Netanyahu will reportedly argue that the terms of the accord were breached because Iran did not disclose the scope of its previous efforts to become a nuclear power.

A senior Israeli intelligence officer told the Times: 'What Iran told the International Atomic Energy Agency about its capacities was almost comical compared to what we have here.

'Iran said there had only been feasibility and scientific studies but what we see is that Iran ran a fully fledged nuclear weapons programme and that it followed directions from the political levels.'

Donald Trump has already declared that the US will withdraw from the pact and threatened sanctions on businesses that continue to trade with the regime

One of the key memos is from the Iranian atomic energy authority to the defence ministry.

Said to date from 2001, it authorises the military to take over the task of enriching uranium hexafluoride (UF6) by centrifuges from 3 per cent to more than 90 per cent.

The higher level of enrichment suggests an intention to create a weapon.

The document was reportedly signed on behalf of the Iranian army by Amir Daryaban Ali Shamkami, who is now military adviser to Supreme Leader, Ayatollah Ali Khamenei.