The community kitchen that inspired the Duchess of Sussex to work on a Grenfell Tower charity cookbook is in a mosque linked to 19 terrorist suspects including the Islamic State fighter known as Jihadi John, an investigation has found.

The duchess visited the Al Manaar Muslim Cultural Heritage Centre this week after raising funds through the book to help victims of last year’s fire.

She has been making private visits to the mosque in west London since January. Prince Harry, Prince William, Theresa May and Jeremy Corbyn have also visited in recent months.

An investigation by the Henry Jackson Society, an anti-extremist think tank, claims that the mosque, which was opened by the Prince of Wales in 2001, was once attended by three of the…