An undercover reporter working for Al Jazeera is believed to have gained access to the Labour Party conference by using a junior Israeli embassy official as his referee.

The reporter, who adopted the false identity of "Robin Harrow", was vouched for by Shai Masot, an aide at the embassy, the JC understands. 

The use of Mr Masot's name meant the reporter’s application was not flagged up for further security checks prior to the Liverpool conference.

The undercover journalist is thought to have filled in a registration form for the conference under his false identity using a Labour Party membership he had set up in the same name.

He also used a credit card that matched the address he was using.

Labour have been contacted for comment.

Al Jazeera, the Qatari-based television channel, has been running a four-part investigation this week, alleging Israeli influence in British politics.

The documentary features footage secretly filmed by “Robin Harrow”.

Mr Masot was dismissed from his embassy role after footage, filmed by the journalist, emerged of him saying he wanted to "take down" Foreign Office Minister Sir Alan Duncan.