am currently working as an assoc for one of the big4.

can confirm that there's a 50/50, or 60/40 split in terms of local and uk uni grads within the trainee batches now. obviously oxbridge grads are valued everywhere but attending ucl/lse/kcl/bristol still puts you in good steed. other than that, better pull those strings and pray hard. (but it becomes pretty obvious when you're the only tasmania/leicester/godknowswhere trainee...)