Most likely reading from my level of the game: He hasn't had his attention taken by any sizeable bets before his post-flop raise, so when he makes a pair of tens (AT is my guess, too) on the flop, he gets super-aggressive to push you out.

He could well have TT (or 44 or 55) but the weak betting gives nothing away. Raising by £1 with trip tens in itself seems weak, especially for someone willing to go all-in against a re-raise, but then again...

I'd say it's 50/50 at this point as to whether he has trips or not. But I think the fundamental problem is that you didn't raise enough up to the point of no return.