I've know about it over 12 months, the BBC chose to ignore it...but, it's stuffed to the rafters with Tories now, so no surprise. I don;t think it's gone on previously, or if it did not tothe scale it happened in 2015, The Battle Bus was the issue, it went all over full of tory canvassers and it wasn't recorded nor the hotel bills and meals or certain printed pamphlets. All thee bills were paid for from a private address, it was blatant fraud and top people new about it, including Davey Boy 
The press and broadcasters and doing their damndest to keep the tories in power, the last thing they want is a fair society. They want to keep their off shore havens, bonuses, workers rights stopped, sick pay, maternity pay and all that will be at risk after Brexit and that will suit the Tories 
Interesting experiment last year and I can honestly say I have seen this happen so many times..it's a good couple of minutes watch. Some of them were appalled to even think they agreed with the policies 