If you were to discard the the Jocks, Micks and Welsh who serve in the British armed forces, the forces would be in a very sorry state. Proportionally, the numbers from the 'colonies' are way above English representation.
Any move to have a seperate SAF or whatever you want to call it would be detrimental to all parties in the UK!
As for mods for deep fat fryers, don't the Scottish squadrons already have them?