And a bit of googling later on found me its web page. Where it transpires that they've recently combined a couple of churches togther to form this congregation. And that for the 8,500 people in the parish it has a a congregation of...24. (Assuming that the whole congregation is in the photo they've used - and it probably is, as they've described themselves as being 20-30 strong).
That's 0.3%. And over 1/3 of those are _really_ elderly.
I believe that overall in Scotland they're doing better than that. But some more googling turns up that they lost 50,000 people between 2010 and 2013. They only have 300,000 people left. At what point does it become worthwhile joining a congregation just so you can be the last member of the Church and end up owning a lot of prime development opportunities?
Original post on Dreamwidth - there are comments there.