Nr,
I think you'll find that in the UK there are only 2 civillian simulators now (BA had a Chinnok but the RAF have it now I think). Bristow have a Super Puma simulator in Aberdeen, and Scotia (ex Brintel, BIH BAH) have a S61 in Aberdeen also, However, I believ that may be moveing down to Penzance at some point as part of the sell off of onshore assetts to British International (uncluding the name in case you're confused!).
No idea what the chances of a free trip would be, commercial rates are in the late 3 figures per hour, so slim I would guess. Both are pretty old technology and are really meant as instrument trainers with a bit of visuals for T/O and Ldg, so you wouldn't be able to waz around looking out the window (well, you can but it takes practice).
I assume you know about the B412 simulator in Shawbury? It is the latest technology and exactly what you need, but I would assume the chances are remote unless you are connected with the ATC and arrange a visit perhaps.
Not much help there I'm afraid, good luck in your quest.
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Another day in paradise