Why change
Why change the clocks at all, don't see the point.
If its for the cows how will they know, can cows tell the time?
School kids mainly go to school in Chelsea Chariots these days and they have headlights (once the driver can find them and switch them on without the blasted rear fog light burning holes in everyone's retinas)
Stay on GMT, it is the global standard after all and we all know why we have standards.