I tried removing my beesting aerial to put the standard one back in because the radio reception was pants, but the screw on the aerial was rusted and stuck in to the aerial base. So I grabbed it with some mole grips but the sodding thing snapped leaving the screw in the base - bugger 
You can see the snapped screw piece in this pic:
So I'm going to have to try and drill it out, although if it was rusted in so much that it snapped with mole grips I don't think it's going to come out very easily so it could need a new base. Does anyone know how much a new base would cost?
Also, I've had a search around the forum and came across a thread saying that the base can be removed by dropping the roof lining and unscrewing a nut. Someone said that you can access it by just dropping the piece of plastic trim off around the top of the boot aperture, i.e. this piece:
Now the question I have is does anyone know how to get this off? I've tried pulling it from the edges and from the boot side with no luck, the thing is I don't want to break any clips that are holding it on. I can pull it away enough to see some big chunky clips holding it on but don't know if there is a special knack to getting them off?
You can see the one of the clips in this photo:
You can see the snapped screw piece in this pic:

So I'm going to have to try and drill it out, although if it was rusted in so much that it snapped with mole grips I don't think it's going to come out very easily so it could need a new base. Does anyone know how much a new base would cost?
Also, I've had a search around the forum and came across a thread saying that the base can be removed by dropping the roof lining and unscrewing a nut. Someone said that you can access it by just dropping the piece of plastic trim off around the top of the boot aperture, i.e. this piece:

Now the question I have is does anyone know how to get this off? I've tried pulling it from the edges and from the boot side with no luck, the thing is I don't want to break any clips that are holding it on. I can pull it away enough to see some big chunky clips holding it on but don't know if there is a special knack to getting them off?
You can see the one of the clips in this photo:
