He also said Mr Adebolajo was “stopped” upon his return to the UK from Kenya and was later “followed up by MI5” who were “knocking on his door”.

He was “basically being harassed”, Abu Nusaybah said.

He added: “His wording was, ‘They are bugging me – they won’t leave me alone.’

“Initially they wanted to ask him if he knew certain individuals.

“But after him saying that he didn’t know these individuals, what he said was they asked him if he would be interested in working for them.

“He was explicit in that he refused to work for them but he did confirm he didn’t know the individuals.”