homebythesea, if by any chance it's Psychology, KCL is offering Psychology as a BSc subject for the first time in 2015. Students will be based at Guy's which is central (although south of the river) but I note from the prospectus that some of the teaching will be at the IOP, which is in Camberwell (not central - 2 or 3 miles south of Guy's).
Being in at the start of a subject could be very exciting and I'm sure they will get a lot of attention because the team will be so keen to get off to a good start. However, there are bound to be teething problems, so he'd have to bear that in mind.
Also, being in an early cohort might (I'm guessing here) mean that some students would get in with slightly lower grades while the programme beds down. They will be desperate to hit their recruitment targets (as long as they are confident that the students they recruit will go on to do well).
Also, if it is Psychology, if he's thinking of trying to pursue a career in Psychology the prestige of the university is not as important, as the absolutely key thing is to make sure that the first degree is accredited by the British Psychological Society. Most of them are but you sometimes have to be careful about module choice.
Of course, if he's not looking it as a vocational degree, that is less important.
However - to finish this long rambling post - I assume he got a C in either Maths or English. Were there any mitigating circumstances? If it's Maths that would be a concern for Psychology as there will be some stats to get to grips with. If it's English that would also be a problem as there is a fair amount of essay writing to do in Psychology. He would do well to think long and hard about whether this is the subject for him (if it is Psychology).
[Disclaimer: I'm not a Psychology graduate, but I used to have a lot to do with Psychology graduates in a recent previous job so picked all this stuff up.]
Anyway, good luck!