Visiting MTC

Gentlemen, I have flown over to London to catch the back half of the Olympics, and have been able to secure a tour of MTC/MPC this coming Friday afternoon. I assume I will get to see a Spider first hand, but what are the odds of a) catching a glimpse of P12 (I suppose I could get 'lost' just looking for the lavatory), and b) getting a demo of a fully-functional Doris? I must say I am way more excited about this visit than my 16-year-old daughter who is reluctantly coming with me to Woking. She prefers to stay behind to attempt to locate Ryan Lochte.

Any special points of interest of which I should be aware while there, besides absolutely everything about the place?