The youngster, a regular in the Welsh U21 set-up, was given the nod to join John Toshack's squad on Sunday.
"I am delighted," Bradley told the club's official website. "To go away with the full squad is an honour and making the step up from the U21s shows if you play well for them they can see you have potential.
"There are a lot of Premier League players in the squad and all I can do is try and do well when I'm over there.
"If I come off the bench I'll be delighted and hopefull it will be the first of many."