Is Christianity on the increase?

I'm not sure about the U.k. as I've not been there lately. However, I do know that more people I know have embraced Lord Jesus. They are now seeing the demons and the evil play their hand and this has thankfully swayed them towards the Lord.

I was in Scotland (a country that is part of UK)..last month..
- short trip.
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Interesting/informative book about..Scotland.
'Land of Many Revivals'
- Scotland's Extraordinary Legacy of Christian Revivals..1527-1857
- Tom Lennie

I think it depends where you live. Certainly not as popular in the South but when I moved up North I met many more Christians than I was used to.

On a local level I've definitely seen an increase. Our local fellowship has grown a lot since 2020.

People are thirsty for truth.

I just looked it up.

The religion question is voluntary; 94.0% (56.0 million) of usual residents answered the question in 2021, an increase from 92.9% (52.1 million) in 2011.

For the first time in a census of England and Wales, less than half of the population (46.2%, 27.5 million people) described themselves as “Christian”, a 13.1 percentage point decrease from 59.3% (33.3 million) in 2011; despite this decrease, “Christian” remained the most common response to the religion question.

“No religion” was the second most common response, increasing by 12.0 percentage points to 37.2% (22.2 million) from 25.2% (14.1 million) in 2011.

There were increases in the number of people who described themselves as “Muslim” (3.9 million, 6.5% in 2021, up from 2.7 million, 4.9% in 2011) and “Hindu” (1.0 million, 1.7% in 2021, up from 818,000, 1.5% in 2011).

Wales had a greater decrease in people reporting their religion as “Christian” (14.0 percentage point decrease, from 57.6% in 2011 to 43.6% in 2021) and increase in “No religion” (14.5 percentage point increase, from 32.1% in 2011 to 46.5% in 2021) compared with England and Wales overall.

London remains the most religiously diverse region of England in 2021, with over a quarter (25.3%) of all usual residents reporting a religion other than “Christian”; the North East and South West are the least religiously diverse regions, with 4.2% and 3.2%, respectively, selecting a religion other than “Christian”.

We live in divisive times, and where extremist thinking has become quite commonplace on the internet. I think the level of hate towards the three main religions has risen steeply in the last ten years or so. It also made me feel more of a bond with Christianity. Every time I've seen someone mocking or trolling Christians online I've felt that bond strengthening. I think this is part of the reason, also, for more people coming or returning to The Bible.

Because of declining church memberships and attendances , and resulting impact upon finances, The Church of Scotland has had to close several churches and place them on the market for sale.

The excellent factual post by @Larniavc prompted me to check the census figures for Scotland to see if they supported my anecdotal observations about Church of Scotland church sales. Unfortunately, the census in Scotland was deferred till 2022 because of Covid and though the provisional results were published last year the religious affiliation data will not come out till this spring. This wikipedia article presents a similar picture for decline of Christianity in Scotland. From 65.1% declaring themselves Christian in the 2001 census, this fell to 53.8% by 2011. It seems probable that this figure is now below 50%.

If the OPs view that a possible resurgence would be linked to the impact of Covid on attitudes then that's unlikely to show up in the 2022 census figures.

I follow online a bit. I went a couple of times during COVID. As someone who has been interested in more esoteric and existentialist forms of christianity at various times, I don't always feel like I fit in the churches I've been too. I've never found my niche, or ever been given much help to find a role in churches I've gone too. I went to one for 8 years. I volunteered to duplicate sermon tapes, and helped with church magazine for some of that time, I just never really seemed to feel part of it though.

As to attendence at churches in the UK - by some reports its been edging back to what it was before COVID.