He has a web page that may help you contact him:

http://www.cornerplot.co.uk/about.htm

wrote:
Hi

I am trying to get hold of Roger Whitehead, a regular poster in this
and many groups...

Can anyone help with a contact email address as the one I have seems
to be invalid?

Many thanks in advance

Vince



--
Debra Dalgleish
Contextures
http://www.contextures.com/tiptech.html