I know some of you are trying to come up with a really good reason for filing in the UK because that was the thrust of the earlier posts, but however much you try, there really arent any good reasons to do so, other than perhaps for those wishing to fly low level over some of the remotest parts of the UK without any other back up plan should things not go their way.
Sorry I do not agree-I would rather spend 17 hours in hopsital being glad I filed a flight plan rather than 17 hours up a mountain wishing I had filed one.