Sajid Javid will take steps to proscribe anti-Israel Islamists Hezbollah later this year and act where his predeccesor failed to, a senior Conservative source has said.

The JC understands Mr Javid vowed to take “decisive action” over the Iranian-backed organisation ahead of last weekend’s Al Quds Day march in London, where Hezbollah flags were once again flown.

Hezbollah's military wing was banned as a terror group in Britain in 2008 but a legal loophole allows supporters to fly the flags at events such as last Sunday's rally, because Hezbollah's political arm is not banned.

The Home Office has the power to ban the political wing and thereby proscribe the group in its entirety.

A Tory source told the JC: "Sajid is a very different beast to the Home Secretary he has just replaced.

“Amber Rudd spoke repeatedly about taking action over Hezbollah – but for whatever reason was not able to get around to doing anything.

“Sajid has vowed to take decisive action on the matter. He will make this very clear over the forthcoming weeks.”

MP Joan Ryan, chair of Labour Friends of Israel, wrote to Mr Javid after the rally to say she was "appalled that the government should once again have allowed this Iranian-inspired hate fest to take place on the streets of London".

She added: "I fail to understand why the Home Office has not heeded the repeated warnings raised by LFI MPs and the Mayor of London over the past year. I have today requested an urgent meeting with the Home Secretary to discuss this matter."

Speaking during a Westminster Hall debate last week, Phillip Hollobone, Conservative MP for Kettering, said: “Very distinguished international bodies have banned Hezbollah outright, they’ve proscribed it as a terrorist organisation… frankly I think we should join them.

“Hezbollah is an Iranian creation that sits as the crown jewel in Iran’s regional strategy of Jihadi revolutionary warfare. It is in short the most powerful armed non-state actor in the world. This is an organisation which potentially is more lethal than Isis, and it is all backed and funded by Iran.”

Stephen Crabb MP, Conservative Friends of Israel chair, also used the debate to attack the “entirely artificial distinction” between Hezbollah’s two wings.

A Home Office spokesperson refused to comment on whether Mr Javid planned to proscribe Hezbollah in full.