"I don't think any club is at a stage where they can use data comprehensively across every aspect of the game, " says Mr Green.

BBC: Football's top teams tap into burgeoning data bonanza

If business comprehensively endorsed the euro, as well as the government, he would "think it wholly unproductive for the mayor to obstruct" that although that was different from his personal view, Mr Norris added.

BBC: Livingstone faces square mile