The only Navion on the UK register was a Twin Navion G-ARIT. This was sold to Iceland in May 1965 and was destroyed in a crash on 3.7.65.
2006 will be the 60th of the Navion and to mark this anniversary may be one of the theme types for a Fly-In at EGSX in June.
Grob Driver - I will try to find Gordon Spooner's phone number for you