Not aware of any degree course but you can apply to be an ATCO with NATS or pay them to attend their courses. You can apply to be an ATCO with NATS up until your 30th birthday. Or if you are willing to pay I am sure they would be happy to take you almost at any age(money talks, its a business) . Dont think it is cheap though. To train an ATCO to validation costs NATS well over one hundred thousand pounds and in some cases alot more. The cost is high because they pay you while you train. There are other places too, a quick search on a search engine on the internet you will soon find them.