Playing the long game is going to help with up holding the Doesday Manifesto. Eliminate some of the least used rooms.
Ask if anyone else can smell gas in specific rooms. Not only does this help bond with your colleagues, collaborative sniffing is so primal, so oxygenating, which can help get everyone revved up and keen to get out of the meeting in question.
Ask if anyone has seen the gas engineer in the east wing meeting room (the large meeting room), especially towards the end of the week.
“You know, I think I did.”