Jeremy Corbyn "adviser" questioned synagogue security in series of offensive tweets

Mr Lezard also compared Israel to apartheid South Africa, and accused the country of coming up with “ingeniously nasty ways to steal Palestinian land”.

On another occasion, in 2011, he wrote: “I’m thinking of setting up another new campaign group. Either Conservative Friends of Nazis, or Nazi Friends of Israel. Whaddya reckon?”

Mr Lezard also posted a string of tweets mocking the Queen and the British Army.

A Labour source told the JC: "Tim Lezard is not an advisor, either paid or unpaid, and is not and will not be employed on the general election campaign."

An earlier version of this story was posted before the comment from a Labour source.

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