"Dreadful," John repeats, and it doesn't come out nearly as posh, probably purposely. He's amused by Q, who's very addiction to caffeine seems to have made him go a bit hyper, a bit more talkative, as if just thinking on it is a rush enough. It's hard to imagine the man after a day's work - keyed-up and letting words tumble out with no stop in sight.
"Never say no to another. Don't suppose they've got import?" A pause, and John is chewing on his own bottom lip and looking around again. "Speaking of poor addictions, pause for a fag? Bloody laws in these parts, can probably get away with murder before smoking indoors."