The London Supreme Court last week not only confirmed that the Westminster Parliament could overrule at will any Scottish Government legislation, irrespective of the Scotland Act and the Sewell Convention, but it also ruled that Westminster had already successfully done so, by retrospectively passing provisions in the EU (Withdrawal) Act that overruled the Bill on the same subject, within the competence of the Scottish Parliament, that had already been passed by Holyrood.

Not content with that, the London Supreme Court confirmed that London ministers may, by secondary legislation, under the Scotland Act decree laws for Scotland that are not even passed through the Westminster parliament.

Which leaves Scotland in this extraordinary situation. English MPs or English ministers in their London Parliament can, at any time, impose any legislation they choose on Scotland, overriding Scotland’s parliament and Scotland’s representation in the London parliament. Yet, under the English Votes for English Laws rules of the London Parliament introduced by the Tories in 2015, Scottish MPs cannot vote at all on matters solely affecting England.

That is plainly a situation of colonial subservience.

I am firmly of the view that the Scottish government should now move to withdraw from the Treaty of Union. Scotland’s right to self determination is inalienable. It cannot be signed away forever or restricted by past decisions.

The Independence of a country is not a matter of domestic law it is a matter of international law. The right of the Scottish Parliament to declare Independence may not be restricted by UK domestic law or by purported limitations on the powers of the Scottish Parliament. The legal position is set out very clearly here:

5.5 Consistent with this general approach, international law has not treated the legality of
the act of secession under the internal law of the predecessor State as determining the effect
of that act on the international plane. In most cases of secession, of course, the predecessor
State‟s law will not have been complied with: that is true almost as a matter of definition.

5.6 Nor is compliance with the law of the predecessor State a condition for the declaration
of independence to be recognised by third States, if other conditions for recognition are
fulfilled. The conditions do not include compliance with the internal legal requirements of
the predecessor State. Otherwise the international legality of a secession would be
predetermined by the very system of internal law called in question by the circumstances in
which the secession is occurring.

5.7 For the same reason, the constitutional authority of the seceding entity to proclaim
independence within the predecessor State is not determinative as a matter of international
law. In most if not all cases, provincial or regional authorities will lack the constitutional
authority to secede. The act of secession is not thereby excluded. Moreover, representative
institutions may legitimately act, and seek to reflect the views of their constituents, beyond
the scope of already conferred power.

That is a commendably concise and accurate description of the legal position. Of major relevance, it is the legal opinion of the Government of the United Kingdom, as submitted to the International Court of Justice in the Kosovo case. The International Court of Justice endorsed this view, so it is both established law and the opinion of the British Government that the Scottish Government has the right to declare Independence without the agreement or permission of London and completely irrespective of the London Supreme Court.

I have continually explained on this site that the legality of a Declaration of Independence is in no sense determined by the law of the metropolitan state, but is purely a matter of recognition by other countries and thus acceptance into the United Nations. The UK Government set this out plainly in response to a question from a judge in the Kosovo case:

2. As the United Kingdom stated in oral argument, international law contains no
prohibition against declarations of independence as such. 1 Whether a declaration of
independence leads to the creation of a new State by separation or secession depends
not on the fact of the declaration but on subsequent developments, notably recognition
by other States. As a general matter, an act not prohibited by international law needs
no authorization. This position holds with respect to States. It holds also with respect
to acts of individuals or groups, for international law prohibits conduct of non-State
entities only exceptionally and where expressly indicated.

As I have stressed, the SNP should now be making a massive effort to prepare other countries, especially in the EU and in the developing world, to recognise Scotland when the moment comes. There is no task more important. There is a worrying lack of activity in this area. It may currently not be possible to spend government money on sending out envoys for this task, but if personal envoys were endorsed by the First Minister they would get access and could easily be crowd funded by the Independence Movement. I am one of a number of former senior British diplomats who would happily undertake this work without pay. We should be lobbying not just the EU but every country in Africa, Asia and South America.

My preferred route to Independence is this. The Scottish Parliament should immediately legislate for a new Independence referendum. The London Government will attempt to block it. The Scottish Parliament should then convene a National Assembly of all nationally elected Scottish representatives – MSPs, MPs and MEPs. That National Assembly should declare Independence, appeal to other countries for recognition, reach agreements with the rump UK and organise a confirmatory plebiscite. That is legal, democratic and consistent with normal international practice.

There will never be a better time than now for Scotland to become an Independent, normal, nation once again. It is no time for faint hearts or haverers; we must seize the moment.