U3A stands for the University of the Third Age, which is a self help organisation of people no longer in full time employment, providing education, creative and leisure opportunities in a friendly environment. U3A membership is not related to a specific age but to a period in one's life after the second age of full-time employment and parental responsibility. Anybody in their third age can join U3A and this includes people who are working part time. All you need is interest and enthusiasm.
Crosby U3A, founded in 1996, includes members from the surrounding area, and is an established group of around 200 members.