It's a Soprano Saxophone, which he stated in his first audition. So yes it is a saxophone and yes he is extremely talented.

Britain's Got Talent has some of the worst directing I have ever seen on tv. What's with all the cutting to the audience/judges/Ant&Dec/back of performer?! It's so damn frustrating. It happened last year and people complained about it, I would've thought they'd get the hint by now and KEEP THE CAMERA TOWARDS THE STAGE. No moving, no cutting ...