At your peril LotUS. I have my rather well worn diagram now but no spike! Has Tuj hidden it in one of the folds? Very cunning you old fox. Moving to Bermondsey increasing my podume defences by factor of 0.01.
Well, I'm going to enter safely with a Plinge defensive at Chalfont & Latimer. Oh, and I believe that'll have some interesting repurcussions for those on the Circle line...