I did my IR at Bournemouth too, and had a similar bunch of questions posed.
On the day I thought all sorts of unkind and unpleasant thoughts towards the examiner. Looking back on them retrospectively, I think that they're all good, valid, intelligent questions to ask - why wouldn't a pilot be expected to know the answers to them. They're much more relevant than some of the JAR written question..has any Captain ever been asked by an anxious member of the cabin crew just what the symptons of glaucoma are?
You can get some good FAA IR oral prep guides (published by ASA I think) that are good revision aids for instruments, approaches etc.- but be aware of potential FAA/JAR differences in various regulations etc.