I thought some might be interested in this extract from the BBC show Addicted To Snuff - Addicted To Pleasure, which features Brian Cox taking snuff in, I believe, that shop in Covent Garden. Haven’t seen the full episode, and apologies if this has already been posted.
https://www.youtube.com/watch?v=QEUXTbBOqgM&list=TLr8WwJgi8Eb0wODA5MjAxNQ