Isn't this cosy, another lefty love-in.
The real question should be, why would any campaign team advise their leader to do these interviews in the first place?
Fact is, very few people come out of an Andrew Neil interview looking good for the simple fact he's well prepared, aggressive, and won't let politicians get away with soundbites. We saw it in the Corbyn interview - Neil would answer a question, Corbyn would give the usual vague answer, but Neil always kept digging...up to 16 or 17 times before Corbyn gave an answer to the WASPI funding question. He destroyed Corbyn and Sturgeon and he'll do that same with Swinson. Farage is a seasoned campaigner at heated debate and will probably fare better. Johnson is very inconsistent when hard questions are flying and would be well advised to stay clear.
In the same vein I've said many times the TV 'debates' are a farce. No-one ever does particularly well and they are nothing more than a soundbite competition. You hear nothing new and the only game-changer can be who fails to perform on TV. I can't think of any debate where I've thought, "well, that person was superb, I might change my vote". Can anyone remind me of a leader's debate that's been well worth everyone's time?
The Tories are well aware what happened last time. It doesn't take much to derail a GE campaign.