But we now have news from the campaign trail. Chris Grayling has been spotted in Ibstock with Tory candidate for North-West Leicestershire Andrew Bridgen.
And, lo, the Leicester Mercury has the story that the candidate has "considerable sympathy" with the idea of amending the law to allow B&B owners to discriminate against gay couples, by not considering them as businesses subject to the equality law.
Mr Bridgen said: "At the end of the day our policy is, we voted for the Equality Bill and as far as people who run a business, they have to offer the same services to everyone.
"But I do have sympathy with someone who is opening up their own home to a guest.
"A public house has the right to refuse a customer and they don't have to give a reason, so I have considerable sympathy for B and B owners in this case.
"It's a grey area, but perhaps the size of the establishment could separate the difference between opening your home to paying guests and a business."
It's more "the law" than a "grey area", as I am sure the would-be Home Secretary could now advise his fellow candidate.
But I am just not sure the Chris Grayling B&B tour of the marginals was precisely what Tory HQ had in mind.