Final answer:
The three religious traditions in Great Britain, other than Christianity, are Islam, Hinduism, and Sikhism. They contribute to the religious diversity of the country.
Step-by-step explanation:
Three religious traditions in Great Britain, other than Christianity, are Islam, Hinduism, and Sikhism. These religions have significant communities within Great Britain and contribute to the religious diversity of the country. Islam is one of the fastest-growing religions in Great Britain, with a diverse Muslim population.