Just to add to the thread, you'll find that TSR is not a representative sample of the real world. It's the sort of forum which would always attract people who are very bothered about their studies (which inflates the 'TSR average grade' way above the real average grade). And students are one of only three groups to obsess about university league tables (the other two groups being academics and education journalists). And broadly speaking, most of them haven't got a clue how the world works after university, or how 'valuable' any particular degree is.
Based on my own experience, and having spent 10 years working alongside hundreds of other people, including some time spent interviewing graduates for jobs, the person counts for almost the entire sum of their success. Not the name on the institution who awarded a certificate. The certificate will get you interviews, but you need something to say about yourself to get jobs. Get yourself a 2:1 and you'll be considered like pretty much everyone else with a 2:1 by almost every recruiter. Aside from UCAS requirements on some grad schemes, A Levels are almost irrelevant once you have a degree. Employers will ask to see what you got, but won't base their hiring decisions upon it.
BCC isn't the best result, nor is it the end of the world, it's better than I did during my first foray into education and I'm doing fine now. Every course will have some people who don't care, and some who are working as hard as you. You might have more people from poorer schools in your cohort than someone at Oxbridge, but there's no reason to believe that they won't work as hard as you, or that the course won't be challenging. Everyone has access to the same journals to do their personal research, and lectures, even at the highest-ranked universities, are intended as a basic introduction to the topic rather than a teaching exercise.