Tim,
I don't understand where you are coming from.
It's [music teaching as part of the national curriculum] certainly something I believe in
I don't think this can be true when you chose to opt out of state education and the national curriculum for your children. You demonstrate by your actions that the national curriculum is not something you support. Or do you only support it for other peoples' children?
The only solution, I think, would be to reduce the scope of the National Curriculum to focus more on those general skills
Which you presumably believe should still include music but not ICT maybe.
Perhaps we should leave education policy to those with first hand experience of the English state sector rather than the Independent sector or the Scottish system (I think that rules out most of our MPs).