Hmmm, maybe... he does mention rugby, though that doesn't neccessarily indicate that he's a fan of it, merely that he knows what it is.
It's possible he's a football fan, I wouldn't discount him as being "not the type"- a LOT of people in the UK are, to varying degrees. My boyfriend watches loads of matches, and he's not exactly a sporting "type". Saying that, I'm not a fan at all, I find it a bit dull, so by the same token, I wouldn't have him down as definitely liking football just because he's British...
I don't know that he ever discusses what he likes to watch, apart from stuff he watches with Spike XD I may be wrong, though... I know he mentions his music collection a few times, I suspect that was more of a passion for him in his younger days than sports.