Thankyou to all who have responded, and links Nigel supplied look very
interesting - Nigel, I will look at yours very shortly.
In the meantime, Keith Edmondson supplied the following link, and if anyone
is interested it is a very good general background of the whole event - inc.
p.graphs.. The address as follows:-
http://freespace.virgin.net/kehla.barnes/disaster.htm
Regards, Bernard
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