Excerpt:
A senior Cabinet minister today launched an unprecedented attack on mayoral candidate Sadiq Khan, calling him a "Labour lackey who speaks alongside extremists".
Defence Secretary Michael Fallon claimed the Labour candidate was "unfit" to be London's Mayor because he had shared platforms with extreme radicals.
He lambasted Mr Khan as "a man who has said Britain's foreign policy is to blame for the terrorist threat". Mr Khan's office hit back by accusing the minister of "demeaning" his office by making an attack "on mainstream Muslims like Sadiq".