No. Most men in the UK are uncircumcised.
"Male circumcision in Britain: findings from a national probability sample survey" is based on the 2000 British National Survey of Sexual Attitudes and Lifestyles (Natsal 2000), then the best available look at the UK population.
They found about 16% of men aged 16–44 years reported being circumcised. The older they were, the less likely it was. With the exception of black Caribbeans, men from all ethnic minority backgrounds or who were born outside the UK were significantly more likely to report being circumcised. Unsurprisingly, religion was also a factor (highest for Jewish men, lowest for Hindus, Sikhs, and Buddhists). Fascinatingly, circumcised men were more likely to report having had homosexual partner(s).