Please see http://www.peterlovetttalks.co.uk/orchids.html for details of illustrated talks that you may enjoy on natural history and history.
My thanks to all who came and produced this great result.
As a postscript, the National Trust walk on the same day found eight species, including the rare Man orchid and the Pyramidal orchid. We may have seen the latter and misidentified it!
Life is a learning curve; at least so far as botany is concerned.