I got PhD place in Cambridge AND scholarship with 2.1. Mys sister got a PhD place in Cambridge with 2.1 . I had a master from cambridge but she came straight from BSc from a foreign country. So, no problems, as they say, they are more interested in an interesing 2.1 than in boring first. It means, if you can persuade them that they really will benefit from you being there, that working with you will be fun, doesnt matter that you are not brilliant.