The industry is a bit of a rollercoaster and going through hard times right now but it is possible to have a good career.
What any prospective games design student needs to know is that there are way more students than there are jobs. Competition is fierce.
If he wants to do it then he needs to be totally committed and there are no guarantees.
It's estimated that 5% of games grads at the moment make it into AAA (big budget studios).
Some courses will do pure game design others will be a blend of game design and development (programming) and some may blend some game art with game design.
Not all grads will want to work in AAA. Some will look to mobile or app development.
Good courses exist at Teesside, Staffordshire, abertay Dundee, Falmouth and Hertfordshire but lots more places offer games courses and will be good too but without the shiny advertising budgets!
He needs to be clear if it is games design he wants and not game art or game development....
Happy to answer any questions if you @ me.
The majority of people in industry have a degree.
The UK has a vibrant games industry but as I say lots of layoffs happening at the moment so it is not an easy time.