Nice Catalina.....too bad you couldn't get closer........
........we have two of them down island at Nanaimo/Collishaw airport........both yellow like your shot here ...........
Ah, I did get closer & I've also posted shots of it here before. It's actually an ex-Canadian Canso (C-FNJF) water bomber & is still in it's orginal markings. http://catalinabookings.org/aircraft.asp It was with Catalina Aero Services at Vancouver Island for a while so it's possible you've seen it. I heard they were going to repaint it in RAF colours for this season but they don't seem to have got round to it yet.
I can post a few more photos but we seem to be overloaded with Duxford shots right now.