We didn`t "send a warship to the Channel Islands".
"HMS Severn, which has previously been used to shadow Russian navy warships off the English coast, can be seen from the port, sitting off about a mile from the French boats. HMS Tamar is nearby and
both ships are maintaining a presence and not making any effort to intervene.
No 10 said it sent the two navy vessels to "
monitor the situation", while the maritime prefecture of Manche and mer du Nord told the BBC the two French patrol vessels were on a public service mission to ensure safety.
France has threatened to cut off electricity to Jersey, the largest Channel Island and a Crown dependency, located 14 miles (22km) off France.
Crown dependencies are not part of the UK, but are defended and represented internationally by the UK government.
Source:
https://www.bbc.co.uk/news/uk-57003069
The best place to observe maritime behaviour and monitor compliance with maritime law is, amazingly, from a boat or a ship!
Very broadly speaking the RN at sea is partaking in some form of exercise with our allies, that can be anything from engagement with a defined enemy to trade missions through to NATO exercises.
It is very fluid as evidenced when HMS Hunter left a NATO exercise to do the trade part in Turkey.
De facto we are in NATO so any actions for or against don`t reflect on the UK alone, it`s not black & white.......... ask Vlad.