We need clarity about Scotland's position, on becoming independent, in relation to the numerous international treaties to which the UK is a party.

The EU and Nato treaties are presently the main focus, and the position regarding Nato membership (and by implication Trident) will be debated at the SNP conference next week.

It has been suggested an independent Scotland would simply continue to be a member of Nato, ie in some way "inherit" membership. That cannot be so.

According to Dr Stephen Neff, an expert on international law at Edinburgh University, the general position is that Scotland would cease to be a party to the UK's treaties. The rest of the UK (RUK), the larger part, would continue as a member. There is precedent for that. Dr Neff's view is entirely in line with that of many other experts, being in accord with the provisions of the 1978 Vienna Convention on Succession of States in Respect of Treaties.

There are no provisions in the Nato Treaty nor any special elements of international law which conflict with the principles of the 1978 Convention and which would allow Scotland to continue as a member or "inherit" membership of Nato. Scotland would simply cease to be a member.

As a non-member of Nato it is surely easier to insist on the neutralisation and removal of Trident (as well as easier to negotiate satisfactory membership terms if membership of Nato is wanted). Indeed Scotland would not be allowed, under the Nuclear Non-Proliferation Treaty of 1968, to have Trident within its territory or territorial waters, and in any way under its control. For Trident to remain, it would have to be under the control and ownership of RUK (or even the US) and under the terms of a new agreement. That would be a huge limitation of sovereignty.

It must be premature for the SNP to pre-empt in any way a decision about joining Nato now, when the possible terms of its membership of Nato are unknown, and certainly premature in advance of any agreement about removal of Trident.

Duncan Clark,

2/9 Western Harbour Place, Edinburgh.