PPL and CPL and IR tests are all around 2 hours, usually the top side. The biggest factor is the length of the Nav legs (or the airways route in the case of the IR).
Looking back through my log books, my test lengths (all JAR) were:
PPL 2:25
IMC 1:15
CPL 2:15
IR 2:00
plus I got an South African PPL in 3:05 - big skies!
My PPL test was the same format as Gonville's. I was given a route A-B-C to plan and halfway between B and C was told to divert to point D giving the heading, alt and estimate (which you can change at the half-way point). I then had to find point D before doing the GH.
cheers!
foggy
[ 08 November 2001: Message edited by: foghorn ]