It seems that Boris Johnson thinks that a train being routed onto a single-track branch line heading straight towards another train is a small matter. BoJo derided those making an issue of the Mill Hill incident as 'just causing mischief'.
Someone should tell him that head-on collisions are much more than mischief. If speaking out about it makes you a troublemaker, then we need more troublemakers.
Get this man off our railway - he's a liability.