Yes I do have an IR ! (Got my licence last week through the post and want to fly some new routes to stop the rust setting in!)
I agree about the training process. When training for the IR, you only fly the routes which you may take during your IRT. Good in a way, but of course this limits your experience a tad !
I thought by doing a fairly busy / complex route such as near to EGLL, would give me a boost of confidence and keep those skills sharper than flying out of Exeter or the likes.
DFC - I flew out of controlled airspace during my IR.