For complex reasons to do with SN DS got a GCSE English grade 4 a few years ago which didn't reflect his ability. He's a genuinely great creative writer, with a wide range of formal styles and vocabulary and perfect SPAG who was scoring 80/90% on that half of the exams and should be able scrape through the analysis half of the paper because he knows all the terminology.
I reckon that a grade 6 on average should be well within his powers, and would give a noticeable boost to his patchy CV. Current sixth form has been promising to get him a retake for eighteen months now and finally said no it's not possible (long story).
I still think that with some practice papers and a few hours feedback it's worth a shot: he performs pretty well under exam conditions. Money is pretty much no object.
Which boards do English Language GCSE with no course work? And how would you recommend going about private entry? We're in London but private online tuition would probably work better for him than an Easter crammer.