Oooops,
I did it again (to quote a pop tart). Looks like I should let Iggy off the hook and pile up the Zeds (zzzzzzzz) myself. Btw Iggy thanks for the good news from the disciplinary panel posted elsewhere.
Now then, as I don't wish to duplicate a song (as someone else has FOUR times to date - not you Iggy), let me suggest that to find the missing letter:
X Marks the Spot - Coldplay!
Joshing apart, Wanderer, I have an idea forming (a cunning plan, My Lord) but it seems that I should Zed on it.
I'll PM you as and when.
Andy & Teddy are waving goodbye.