OK, New struts fitted in roughly 10 minutes for the pair. They are realy good and only one strut held the bonnet up on it's own. Now when you open the bonnet, once you lift it up by around a foot you can let it go and the struts take it up the rest of the way on their own, Magic...
Removal
Prop up the bonnet with something.
unscrew one of the top securing pins with a 12mm open end spanner.
Unscrew the bottom securing pin with the same spanner and remove the strut
Fitting
Screw in the two new securing pins that comes with the strut where the old ones came out. 13mm open end spanner.
Push the new strut on to the pins. It just pops on. (thick end of the stut goes to the top)
Carry out the same for the strut on the other side.
One happy bunny... No more bonnet dropping on my head.
FYI, the struts I received are manufactured by a company called Strongarm.
I did take photos, but I'm not sure how to upload them on this forum. I might try when I have time.
Andy