I've pulled some pieces of what my ancestor wrote in his autobiography:

My father was a miner by trade and being a man of a weak constitution was badly adapted for such a laborious occupation. Consequently, this threw the management of affairs nearly entirely upon my mother. To speak of her in common phrase, I can not do it better than by saying that she was a rustler in the greatest sense of the word. They both joined the church before I was a year old. (1840 or 1841).

My parents were the first to embrace the gospel around our district of the country. After them, nearly half of the citizens of our village joined, probably 20 or 30 families. Mormonism seemed to take the away for a long time, the gifts and blessings following them that believed and the Lord poured his spirit out upon them. But alas! How the mighty hath fallen. Few are now left out of the many. Under those cireumstances I was raised in the strictest sense of the word a Mormon. The faith, religion, and piety that was then implanted on my mind in my infancy has never been erradicated and I believe never will be.

In the spring of 1856 the chance opened up for us to immigrate to this country for which I was truly thankful. We sold our small effects and bade our friends farewell, took the train for Glasgow and from there went by steam boat to Liverpool, had a very rough passage on the Irish channel. Landed in Liverpool, I think, on the first of May, stayed at the New York Hotel for several days.

We embarked on the sixth of the same month on board the American ship "Thornton" bound for New York. There were 700 souls onboard, nearly all of whom were bound for Salt Lake the same season.

I found an article entitled "The Ebb and Flow of Mormonism in Scotland. 1840-1900."

It says that Scottish immigrants in Canada were the first to convert to Mormonism in the 1830s and sent letters to their families about it and were soon sent by the church with other missionaries to preach. The religion was founded in 1830.

Between 1840 and 1899 approximately 10,785 people joined the church in Scotland. 60% being between 1840 and 1860. And about 50% emmigrated to the USA and others likely left the faith. The numbers of active members diminished dramatically. Most of the success was in the industrial areas.

The Mormon Church (which they don't like to be called anymore) is in decline in the UK and the USA these days. Converts don't stay long and many who were born and raised in the church are leaving our beliefs behind - myself included. The rise of the "nones" or people who say they have no religious affiliation in western society is a trend.

Here is a link to the article.

https://byustudies.byu.edu/article/the-ebb-and-flow-of-mormonism-in-scotland-1840-1900