Tembo, I don't know if ladders were a problem at Duxford this year, but our beloved commentators certainly asked people to refrain from standing on them at the front of the crowd line. I was in the Friends of The Fighter Collection area and no problem there, but then of course they are all extremely well mannered!!!
Only probs I had were with a tractor and my mate Mike's head, both of which made several unbidden appearances in the viewfinder just as the shutter clicked...
