We’ve had a drama based on the Wagatha Christie trial, Kenneth Branagh in horrifying Boris Johnson cosplay for Michael Winterbottom’s Sky series This England and a whole spate of shows about start-ups gone very, very wrong. ITV is on the verge of casting Sheridan Smith in a three-part ripped-from-the-headlines drama (aptly, it’s a gag that was quite engaging the first three times, but now just feels a