One royal insider said of the latest report: "She appears to be asking a question, not making a statement. She is not expressing a view."
The Queen is, officially at least, politically neutral, but she intervened in the Scottish referendum debate in 2014 by suggesting in a conversation with a member of the public, which she knew was likely to be reported by the press, that she hoped Scots would "think very carefully" before casting their vote.
It was seen as a clear indication that the Queen wanted Scotland to remain part of the United Kingdom.
Lacey made his claim about the Queen questioning dinner guests in a blog for the Daily Beast website.
He told the Telegraph: "She asked the question in the context of a general debate - she loves a bit of forthright discussion and this sort of remark is tossed around the dinner table like a ping pong ball. That is the way she frames her questions."
A spokesman for the Queen said: "We would not comment on private conversations the Queen may or may not have had."