Andy,
Was going to suggest taking some pictures.
When you mentioned tabs on the inside of the glovebox, which thread were you looking at, it sounds like it was a 7th Gen which is different.
The pictures on the 6th Gen pollen filter change is a left hand drive car so it looks quite different.
From memory when you open the glove box you should see two screws at the top, one either side, when you undo these I am pretty sure you can withdraw the glove box itself, you then need to remove the plastic underneath the glove box, this will reveal the wire looms and connectors and you will probably see the filter panel.
I need to do the filter on our 6th Gen so will refresh my memory, probably at the weekend, so i'll compare your pics to how ours looks etc.