https://www.spectator.co.uk/article/a-christian-revival-is-under-way-in-britain/
Oh I do so love it when people use unverifiable anecdote (oh look at how many more people are rushing to St Bartholomew the Great) as justification for a broad conclusion (just look at that christian revival) despite this conclusion not being backed up be actual evidence (that the CofE itself publishes annual statistics that show attendance continuing to decline rather than rising - covid years apart). And of course this typically comes from someone who wants their generalised conclusion based on their unverifiable anecdote to be true.
But there are some other aspects here.
First the church in question - St Bartholomew the Great - I know it very well as it is really close to one of my places of work. It is very far from being a typical church. It is a very important historic church and smack on the tourist trail (all sorts of tourists, more of that later). Anyone who knows the area won't be at all surprised that the church is full of affluent younger professionals, because those are the kind of people who live, and importantly work, nearby. It is a world away from the typical CofE church in a town or village, where the average congregation is about 30 people across a whole week and whose congregation are very elderly.
Secondly - tourism - it is a church regularly visited by tourists, and not just the casual drop-by but at it has a very highly regarded reputation for its music and singing that includes choral tourists. I know very well as I've thought about (although not actually been able to) attending choral events there and I know a number of members of my choir have regularly trotted down there to participate in their choral evensong (largely for the music, not the religion).
But there is a a broader point - I get really frustrated with people who claim that just be looking around that they can tell that their congregation is growing or shrinking. The decline in attendance for CofE is about 3% a year. So if a church had attendance of 100 a year later that would be 97. Unless you actually count there is no way you'd really notice the difference between 100 people in the congregation and 97.
But also there will be a tendency to notice 'new' people rather than notice the couple who typically sat on the other side of the church six rows back who are no longer there. So in a situation where four people stop attending while two new people join it will lend itself to an anecdote about the new people, despite overall numbers declining.
That's why anecdotes of this nature tend to be a load of non-sense. Anecdotes are only really useful if they are treated purely as an unverifiable anecdote, without any generalised conclusion. Or if the anecdote aligns with the proper evidence that shows the same thing. In this case it doesn't.
