When Cardiff City striker Jay Bothroyd was an 18-year-old coming through the youth system at Arsenal, his reaction to being substituted in the final of the Premier League Youth Cup immediately cost him his future at the club. He pulled off his shirt and tossed it scornfully at the coaches in the dugout. He was, literally, sent to Coventry, to restart his career.

In the hotly competitive world of youth football, where the most promising players are hunted by a pack of ­ravenous agents, scouts, and managers, it is rare to find the perfect combination of talent and temperament. Terry Burton, Cardiff's assistant manager, remembers the moment he clapped eyes on a boy called Aaron Ramsey, who immediately impressed on both counts.

"He had just left school and was only two weeks into his career and we drafted him into the team for a friendly at Merthyr Tydfil. He was excellent. He had this maturity and vision above his years." Burton got straight on the phone to the manager, Dave Jones, and told him Ramsey had to be included in the first-team squad for their pre-season trip to Portugal. The boy never looked back. His first full season, which began at the age of 16, ended with an appearance in the FA Cup final last May. "In a very short space of time he added to the small list of folk heroes at Cardiff," Burton adds. "Everyone loves their own, don't they?"

He was the one to tip off Arsène Wenger about this special kid at Ninian Park. Burton's connections go back to his time as an apprentice at Highbury, where he went on to coach and help bring through players such as Tony Adams. "I have been 20 years away from the Arsenal and I never really knocked on the door to recommend someone," he says. "But I did with Aaron. That's how impressive his qualities are.

"I spoke to Arsène just before they signed him. I was sitting with him in his office at the training ground and said: 'I'd really like to find something negative to say, but I can't.'" The worst he could come up with was that he was exceptionally quiet – ­surprisingly so for a lad nicknamed Rambo who wrote on his social networking ­webpage that he was scared of "nuffin".

As Burton explains: "Having come across a lot of London boys who obviously have a ­different type of personality, you didn't really know Aaron was about the place. Not on the pitch, though. As a character, that's where he comes to life. That's the best way, really."

Burton was also important in swinging Ramsey's decision away from Old Trafford and towards north London. "Manchester United were in, just after we had played in the Cup final. I said to Aaron: 'I don't know what is going to happen, but if you get the chance, ­consider Arsenal because of the way they play and the way you play.'"

Burton is sure there will be no resentment from Cardiff's vociferous fans this afternoon and says they are all very proud of him and how he is pushing on. It is easy to detect the improvements that come from working with, and against, faster technicians. "It is not very often that young players move up and get straight into the team," Burton says, smiling. "He did that at Cardiff and again with ­Arsenal. He'll be thinking the game is easy."

Not quite. Even though Wenger describes Ramsey, who was 18 on Boxing Day, as "ahead of schedule", he still has to take on board some valuable lessons. While he has caught the eye with some of his cameo appearances this season, a splendid first goal in the Champions League at Fenerbahce being the best example, on other occasions he has been guilty of preferring the flash over the safe option in the closing stages of nervily tight games. Nobody doubts that he will soon learn.

At the rate he is progressing, his home town of Caerphilly will soon no longer be famous just for producing cheese and Tommy Cooper.