First a thank you to PPRuNE Pop for bringing the programme to my attention.
Second after having watched it (actually 'glued to it' would be a better term), about an hour later went into Grumpy Old Man mode along the lines of why did'nt they include this, hmm could have been more on that, then realised that in fact it was a very good programme which had to fit a timeslot
If they had attempted to cover everything I was inwardly whinging about then a series of at least six programmes of 1 hour each would be needed.
Well done Channel 4!
DIH