I used to regularly drop off Mrs Stik at NWI for her day job, my last bill put me off - £30! To fly from our strip to Norwich takes about 9 mins - to drive it can take over an hour! It was no longer possible to prebook discounted landing fees for training when I last tried. It is possible to piggy-back onto a regular base operator and receive 60% discount but frankly I'd rather avoid the place and the 6 minute taxi to Alpha hold for 27.
IO540, the area that you need to go to is hangar 12 via D. I have managed hangar 14 via E a couple of times but that just excites Whirly's friends/instructors far too much!! Good wheeze, though!
Flash - you are a dipsh!t. You could have landed your v noisy beast here, shared some of my wine and doggy would have had her own kennel.
Notwithstanding the above, Norwich ATC are amongst the most helpful I have ever come across, Niknak, DSATCO, P, etc.
Stik