Now without consulting the wiki referee, I guess there are:
* Various M2's or local equivalents without an M1. There is also no M7.
* Several cities with subway lines 2,3 and so-on but no 1.
You forgot hotels without a Floor 13.
I wasn't being serious, of course, but we shouldn't underestimate the ability of the
PR industry to come up with ludicrous ideas.
I think the new survey won't be taken that seriously because it was commissioned by the airport.
Interestingly, there was a comment made on the Evening Standard website by one of residents who was interviewed for the survey, suggesting that the Heathrow press release and the backing Populus report did not properly present the context in which the questions were asked, and that neither made any mention of the responses to other questions that were asked, for example about noise mitigation measures.