Sorry Flinders & Moomin. I had a good look in the garage but unfortunately I must have thrown the old one away.
Apologies for raising hopes.
However, all is not lost. When you get the new parts you will be able to see the indentations on the new surround and when you flip it over, you will be able to visualise how the screwdriver passes through the indentations and then locks into the retaining tab,s allowing you to lever against the retaining tabs and releasing the surround from the hole on the bodywork. It sounds more complicated than it actually is. Someone has actually put some thought into how to get these out when they were designing them for Audi - its quite a clever little bit of design.
Moomin - I would advise getting the surround as well as the actuator. If you are retaining your existing surround, you wont be able to use the screwdriver through the indentations method unless you seal the holes back up again, otherwise you'll risk getting weather in. You may also end up getting a smell of fuel in the boot as well.
If you dont pierce through the indentations but instead try to lever it out from round the edges of the surround, you risk slipping and possibly damaging the paint. For the little extra that it costs, I believe that its better to fork out for the surround as well, rather than trying to lever the old one out.
Hope this helps.