Today, we look at a BBC investigation which has revealed that MI5 lied three times in court to protect one of its own violent, neo-Nazi agents.

As it was defending its handling of their agent who had attacked his girlfriend with a machete, MI5 lied to three courts when they said they had stuck to its policy of not confirming or denying their agents’ identities. They had actually given information about this agent to BBC investigations correspondent Daniel De Simone as they tried to persuade him not to continue his investigation. MI5 has apologised to the BBC and all three courts.

Adam is joined by Daniel who explains the details of his investigation.

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Newscast brings you daily analysis of the latest political news stories from the BBC. It was presented by Adam Fleming. It was made by Chris Flynn with Shiler Mahmoudi and Adam Chowdhury. The technical producer was Philip Bull. The assistant editor is Chris Gray. The editor is Sam Bonham.