Final answer:
Mary Wollstonecraft is the UK theorist and feminist mentioned in this question. She was an influential figure in the feminist movement and advocated for women's rights and equality.
Step-by-step explanation:
The UK theorist and feminist being referred to in this question is Mary Wollstonecraft. She was a prominent figure in the feminist movement during the late 18th century and is considered one of the founding voices of modern feminism. Wollstonecraft advocated for women's rights, education, and equality, and her most famous work is 'A Vindication of the Rights of Woman'.
Learn more about Mary Wollstonecraft