I would just make a position report, and I would do it at any field. Once did it after departing a towered field, another aircraft was reporting 10 miles to the south descending through 5000, and I was 10 miles to the south at 4500. As the tower blokey didn't seem to give a toss, I called up "XXXXX 10 miles to the south 4500"
I tell you what, these new fangled contraptions like "GPS" and "Radio" don't half make it dangerous flying around the british isles.
