One of Britain’s biggest airports has launched an investigation after an Israeli author claimed he was subjected to anti-Semitism by staff over a poster promoting a talk on the Oct 7 attacks.

Alon Penzel said he was challenged by an airport security guard while on his way to the departure gate to catch a flight from Luton Airport to Tel Aviv.

At the time he was wearing a T-shirt with the slogan End Jew Hatred and carrying an A3-size black and white promotional sign emblazoned with the title of his book, Testimonies Without Boundaries Israel: October 7th 2023.

Mr Penzel claims that after passing through security checks, a security guard stopped him and told him that his sign was “offensive”.

The 23-year-old campaigner and journalist had spent a week in London promoting his book, featuring first-hand accounts from Hamas hostages and survivors of the Oct 7 massacre, which killed 1,200 people.

He had also been invited to speak at a House of Lords event by historian Andrew Roberts.