The base tours are no more I'm afraid. The new management of the FAA Museum at Yeovilton, which ran the shop and cafe in Culdrose's viewing enclosure, decided to close it as it wasn't making enough money. Seeing as how it was generally stacked out during the holiday season I have no idea how they came to that conclusion but, bean counters eh?
The enclosure is still open but the building has gone, there are no more tours and I believe the toilets are now permanently closed. There is a handy bush however.