In reply to isi_o:
The important difference is to recognise the difference between those parks in England and Wales and those in Scotland which have additional aims. They are not just for conservation and have an additional aim:
The four aims set out in the National Parks (Scotland) Act 2000 are:
To conserve and enhance the natural and cultural heritage of the area
To promote sustainable use of the natural resources of the area
To promote understanding and enjoyment (including enjoyment in the form of recreation) of the special qualities of the area by the public
To promote sustainable economic and social development of the area’s communities
They have a very difficult job and finding a balance is often impossible I think.
I presume you are up to speed about the general sensitivity on the Sound of Barra SAC, the hedgehogs in Uist and the impact a national park would have on Harris being a crofting area which neither of the others in Scotland are. There is also the danger of a Harris National Park destroying the cultural heritage which the CairnGorms one is very good at.