A prominent investigator into antisemitism said pro-Palestinian activists in Brighton "harassed" him while he was with his 13-year-old son by taking pictures of him and sharing them online.

David Collier was in Brighton on the weekend with his family when members of Brighton and Hove Palestine Solidarity Campaign spotted him and took photographs of him and posted them to Twitter.

Mr Collier said activists also took pictures of him with his son - although these were not shared online.

“I was waiting near the clock tower in Brighton to meet my family because we had all gone off into different shops and my son had come to meet me," Mr Collier told the JC.

“They kept taking pictures of me with my son which is inexcusable. It made him feel uncomfortable. My children should not be a target.”

Mr Collier has been behind several investigations into Labour antisemitism. He revealed Jeremy Corbyn had been a member of the infamous Facebook group Palestine Live, which was rife with Holocaust denial.

Brighton and Hove Palestine Solidarity Campaign had set up a stall at the clock tower which is central to Brighton’s shopping area and is often used as a meeting point.

He added: “It was just an obvious place for me to meet up with my family after we had all been in different shops. I wasn’t doing anything to bother the stall I was just sitting there waiting. But then people started taking my picture which I thought is a bit creepy.

“I don’t know why they just didn’t leave me alone. It is harassment and obviously my son felt uncomfortable. They wouldn’t stop.  Every time I turned my head one way they would try and take a photo.”

The @BrightonPSC Twitter account published a picture of Mr Collier sitting on a wall outside of a shop.

“We do hope anti-Palestinian zionist blogger David Collier @mishtal (or his doppelganger) enjoyed his wasted visit to Brighton checking out our stall,” it wrote.