It has never been meant to be a peacekeeping force but a dissuasive force. It is meant to be on Ukraine's side from day one, not one to be in the middle. And that's a good thing in my book. There clearly is a victim and a criminal here.
It still will be dissuasive because western soldiers and western air forces will still be used on the ground and in the skies of Ukraine. This was the French vision ( having the troops sent there be used not on watchtower duty but to make the ukrainians into the future EU armed forces by integrating western millitary standards into the ukrainian armed forces ) It's good the UK sides with that vision.
If they wanted peacekeeping, the Russian proposition of putting UN troops as a peacekeeping force would have done the job.
And leave us with Vance? It's the same incompetence.