No answers as yet, but on reading the article contained at : http://peugeotlogic.com/workshop/wshtml/electric/ac306/coolfan2/fanop1.htm
I found the fuses feeding the fans. They are contained in the unit just above the ABS box.
Why both fuses blew is the mystery, but at the moment everything OK and the STOP lamp has gone out...
Bob
September 2010