Would be interested to know that as well, seeing as the only active N reg is Barrow's 16339 on schools Not like Reays ex-Stagecoach M reg B10 that was used on Carlisle city services most days with the ex-Dublin Olympian (guaranteed easy access?), then there's the 5 N reg ex-Stagecoach 709D's, the ex-Go Ahead N reg open top Olympian and the ex-Arriva North Wales G reg open top Scania.
Oh dear we are getting touchy
Nice list of reays buses but strange that you missed out the main 60/12/62 reg buses they have
The n reg shed I saw was at cardewlees near Carlisle there was no number on rear screen as surprise surprise it wasn't working but it certainly wasnt on a town run!!!!