Just finished changing the oil, and thought I'd even up the bonnet a bit by adjusting the stops - went too far, I guess, and bonnet was stuck shut! I fixed a stuck bonnet on another omega when the cable had gone slack, by yanking on the cable under the drivers side panel, but no effect this time, and not really appropriate this time as cable had tension. Nobody available to help do the bonnet bounce/cable pull trick, so I went online to look for another way. Clearly you can't remove the grille with the bonnet down on facelift, otherwise people were suggesting cutting into it to get at the catch - no thanks! Then I found the trick: duct tape on the catch lever, pulled up tight and stuck on to steering wheel to hold it - went around and bounced the bonnet till it opened! Bonnet stops are back down, greased up the spring and pillar and adjusted the cable a bit tighter just for good measure. Those stops have to be changed just a little at a time, or else. And duct tape - in my top 10 of most useful inventions!