Thanks for your concise reply........I was not sure that only two people could carry out such a complicated, demanding job, when in the past there were up to six allocated to this title, including other riders etc.

It will be a very demanding task and I wonder if they can do what Jack Wood and his colleagues did in the 20th century !!

I would like to reproduce your reply in entirety, unchanged on my TT 2005 website if you would be so kind.
Thank you
Ian TTFAN