Birchall
Dick Chown Award 2016
Mine cost a mere £8 over a Year ago and has worked perfectly ever since!
David
But is yours a mk2 RNS E?
Mk1 owners are lucky, theirs is not so sensitive to the DVD type.
Not only that but but yours does not have the latest road/route/speed camera changes. So it is time for an update perhaps to the 2016 version? (In your case an £8 one).
Steve B