Most of what I know is about the broadcast end of the industry.
I would suggest he avoid most 'media' type courses - they are largely about production, rather than technical aspects. Many people come into the industry with a media degree, expecting an immediate career, and are disappointed spending years doing junior 'running' jobs on low/no pay. Even now, being in the right place at the right time (and knowing the right people) is important.
For engineering in the classic sense, Salford University was always good for Acoustic engineering - one friend of mine did a placement with NRK in Norway, and one of his projects was for Celestion. He would almost certainly need Maths and Physics for that. Salford (and many others) also do a Media Technology degree these days.
For industry-centred courses,
Ravensbourne college used to be one of the recommended places. You could also try the
Broadcast Engineering course at Liverpool John Moore's University. Both establishments should be able to furnish him with their current requirements.
I would suggest that Physics and Maths would be a good starting point. I didn't do Maths at A-level (Phys/Chem/Bio for me) and have occasionally had to delve into the books ever since as a result. Electronics would be good - I did electronics as one of my options with Physics A, as I couldn't do it separately. Music A-level wouldn't hurt. Most of the people I've worked with over the years are in TV/Radio/Audio more by luck and interest, than by design. It's largely about applied, rather than pure science, and quite a bit of it is art, as much as anything. Extra-curricular activities (sound and lights for college productions and gigs, hospital radio, amateur radio) are going to help too. I built an electric guitar, and that almost certainly got me my trainee post with the Beeb - it's always about gumption, and get-up-and-go, as well as academic qualifications.
The downside at the moment? Everyone's got a PC and everyone thinks they're technical enough to do it all at home. The TV industry is contracting (and not a few audio engineers work in TV), and I suspect that the Music industry will too. In a few years time, the days of audio engineers and real studios may be numbered, the same way that TV studios and engineers are currently.