Substantial Russian activity also near UK, raises concerns that Russia would cut off UK. [0] Russian ships ‘plotting sabotage in the North Sea’ [1] [0] https://www.independent.co.uk/news/uk/home-news/uk-undersea-... [1] https://www.independent.co.uk/news/world/europe/russia-ships...
Now, what the British Navy would do about this I'm not precisely sure. But even to escort the ships away would put a stop to it, and the UK wouldn't be cut off.