most research councils in the UK stipulate that you need either a 2.1 or a 2.2 and a masters, so technically, you are eligible for funding (i'm sure you already know that!). But whether you get funding or not depends on so many other things, e.g. relevant experience, motivation, communication skills, intelligence, specialist knowledge e.t.c. In most cases, it's these other things that you will be judged on.