Thanks for getting the thread back on track.

He was a new player and he quite clearly pushed the glove out of the way to stop me tagging him. A big argument kick off after the game about it, between the sides and email have started flying around. I was just looking for some rule to quote to end this argument

In that case, all you can quote is the rules on interference as mentioned by previous posters. But because they don't explicitly mention that interference includes deliberately knocking the ball out of the glove, the people you're trying to convince may not find this compelling.

On such a play, though, it is entirely the judgement of the umpire that matters, and there are two judgements that need to be made. The first is whether there was interference. If what you described as "he quite clearly pushed the glove out of the way" is accurate (this is very subjective, btw), then it sounds like interference to me. If there was interference, then the second judgement is the likely outcome of the play had there not been interference. In your case, a double play seemed obvious, so if interference had been called, two outs would be the minimum penalty. But a triple play is never as obvious, and the umpire would have to be convinced that such an outcome was likely before giving a three-out penalty for the interference.