Again, I thank my right hon. Friend. Yes, he refers to a serious escalation that the recent incidents have illustrated, and the UK Government absolutely agree with him on that. I am pleased that he mentioned the recent visit of my right hon. Friend the Defence Secretary. On other proposals, we have no plans to change our conduct of activity in the area.
My right hon. Friend asked whether this is a breach of international law. The United Kingdom’s assessment is that, under the UN convention on the law of the sea, states can require any warship not in compliance with the laws and regulations of the coastal state to leave immediately. However, Russia’s actions in ramming, boarding and seizing vessels do not conform with the law of the sea. Russia’s actions were disproportionate, particularly as the ships had left the area and were returning to the Black sea. The 2003 sea of Azov bilateral treaty between Ukraine and Russia provides for the free passage of the military and civilian vessels of both states through the Kerch strait and in the sea of Azov, so my right hon. Friend is right to suggest that this is a breach of international law. I know the Prime Minister has today received a request to speak to the Ukrainian Prime Minister and that, in her busy timetable, she will be giving that urgent consideration.
On sanctions, measures have been taken in the past in relation to previous activity by Russia and sanctions were recently considered in relation to both the Crimea annexation and of course the building of the Kerch bridge. Any further sanctions will be considered in co-operation with European partners and others. It is very important that there is a sense of unity in response to what has taken place. The United Kingdom was active in calling a meeting of EU partners yesterday, and the other meetings that took place also saw a very strong response from the United Kingdom and others.
The House is right to see this as a serious matter, and it is important that it is not escalated further. That is why we have indeed called for the immediate release of the sailors, and we ask that all parties act with restraint but certainly recognise where the act of aggression came from in the first place.