Covington remaining tight-lippedCovington & Burling is only retaining half of its trainee cohort in the UK this September, RollOnFriday understands. Only four out of eight of the trainees will be qualifying at the firm, a source told RollOnFriday. A retention score of 77%. It follows a similar retention score of 76% in the last round, when the firm retained 32 out of 42 spring-qualifying trainees. If you know the retention scores at your firm, do get in touch.