Why should the ICC tighten up on who a home side picks as their substitute fielders? This has been happening for a long time. It's not as if England have two or three specialist twelth men who follow them round for the whole series. They simply pick the best fieldsmen from the Counties who are not in action on a particular week. It's logical. Why should Tremlett be forced to hang around the dressing room and do a bit of fielding when he could be playing proper cricket somewhere. It's a logical, legitimate use of resources.