60% 5 A*-C is actually higher than the national average, I'm afraid so I don't think you will able to necessarily say it's all context. Obviously, you will be compared contextually against a privately educated student, but 60% is actually good for a state school (it's much better than mine lol). Generally, people say go for oxford if you have good gcses, but if you are able to get 85-90+ on UMS AS levels, for your 3 best subjects (for law) then you should consider applying to cambridge. They really aren't that different, just cambridge puts a lot of emphasis on UMS, whilst oxford doesn't even ask for them, and focuses ion GCSEs. I'm not saying don't apply to oxford, just think about it carefully, and if you might wanna try at cambridge which might give you more of a chance.