As a northerner :) I would endorse the national LVT idea.

I see no reason to couple this at all to the local taxation question. Income and land taxes nationally, with local authorities able to vary either or both.

Not personally a big fan of LIT, but I can see the arguments for not backing down.

Actually, I think you over-egg it a little Jock. Promoting the most cost-efficient use of land consistent with the permission is likely to mean less ecologically efficient uses are adopted.

But anyway, this can be corrected elsewhere and LVT is still a good idea for the other reasons you give.