My point is if we're switching we should go to secular one but that won't happen as it will be Jerusalem.
It already works for the Olympics, Northern Irish get to select who they play for, Scotland is told to get on board and manages fine. We essentially do this in Cricket as well as anyone Scottish who's good enough play's for England as does anyone Irish (although Ireland should have it's own Test team by now), the Welsh are already part of the team as it's actually England and Wales. So yeah can't see why it's a problem.
Interesting complication in Cricket which anthem do we play then?