It is possible to study Social Policy as a joint honours degree with History (50% Social Policy, 50% History).
Social Policy is about the study of welfare in its widest sense. It studies the variety of ways in which welfare can be provided, paid for and regulated, and compares the different approaches nation states take to the welfare of their citizens and others.
History is one of the most inspiring, dynamic and relevant subjects that can be studied at degree level, and so it is no surprise that History remains one of the most popular degree subjects in the UK. It has an established range of concerns, but it is always expanding and changing as it responds to new themes or ideas raised by other disciplines. It is also a very practical subject, and during your degree you will develop various transferable skills that employers value highly. Surveys consistently indicate that History graduates obtain employment more rapidly than graduates in many apparently more 'vocational' subjects.