Here’s a useful thing: You can put .rss on the end of any Discourse url and get an RSS feed for that page. Even the Latest, Unread and New views work.
Only works for public categories, though.
I’ve put http://discourse.southlondonmakerspace.org/latest.rss into Feedly on my phone. Let’s see what happens!
Here’s a post to make it go beep for you 
It didn’t. Probably only pops up with new threads.