Top of the handle, rmeove the tweeter grille and the screw under
there. Remove the blanking plate thing at the top of the grip and
remove the screw under there too. Bottom of handle remove the little
plug thing and remove the screw behind that.

The handle then pulls off, be careful of the wire to the tweeter, just
disconnecte it and you can remove the tweeter from the handle then, it
just unclips.

If you don't have the electric window blanking bit at the top of the
handle then I'm stumped as the Corsa B front door handles are
identical to the Vectra rear handles and they all have this blanking
bit unless they have rear electric windows. Maybe try removing the
other 2 screws mentioned and see if it comes away from the door.

Dan

Theres definately no electric windows blanking plate, and the grill for the
tweeter is part of the enclosure. I can only find one screw, at the bottom
and its not covered as you described. I'll take a photo later to explain
better, but what your describing sounds very different.
There's no tweeter in there at the minute, I intend to fit one.
Thanks for the help anyway, I have a feeling the top part clips in but I
daren't just yank it for fear of breaking it.

Andy M