In my situation, choice following on from a range of issues I had with the foreskin. All the men in my family before me (dad, grandparents, uncles, brothers) were all circumcised at birth. Since my, as I like to call it, correction the only one not is my younger brother.
You are however right, most brits aren’t. I think it runs about 17% cut but a significant chunk of that will be Jewish or Muslim I think so tend to practice it for religious/cultural reasons.