Thanks again Gianna and Richard.

I totaly agree that it is what is happening now is the issue and that
observed average temperatures have generally been rising in the last
100 years or so - however, Met Office scientists have said that the
graph "contains assumptions that are not permissible" and "we cannot
make claims as to the 1990s being the warmest decade" - so are they in
that extreme minority who have questioned the graph?

Does anyone have a link which shows the observed average global
temperatures for the last say 30 years up to the present - as the ones
I have seen seem to end at the year 2000. What has happened to global
average temps since the hot one of 1998?

Cheers

Chas M