First thing, have a look at the CAA website for details on minimum age, medical requirements etc for the licence you're after. Bristows, as you know are a company of good reputation and long standing, the sort of place you can still have a career. Saw at least one post in the last few days of a graduate from the academy looking for job, that tends to infer that there's no guarantee of of a job with Bristows on completion. Good luck to you.