A Conservative attack on the Mayor of London Sadiq Khan has been condemned as “shameful” by former Tory MP Nick de Bois. The TalkTV host and political pundit, who lives in Bishop’s Stortford, waded into the row about a video clip posted on social media by the party which capitalises on a slip of the tongue by the Labour mayor during a television interview. Mr Khan was talking to Sky News about his party’s decision to disown two by-election candidates for anti-Israel comments. The mayor said: “As far as I’m concerned, that sort of language isn’t acceptable, and it certainly shouldn’t be accepta…