[Arran]

 The spider must have detached itself fro it to be pulled out like that. I would remove the speaker from the chassis first before messing with it any further. But to do this properly you will have to remove the dust cap from over top of the voice coil, then insert some plastic shims between the inside of the voice coil and the pole piece, Then with the cone dry, pop the voice coil back where is should be, but if the spider has popped loose glue it back onto the frame. Then after the glue has dried, and the voice coil is back in place, dampen the cone and put it aside to dry either facing up or facing down. No matter what you read anywhere, DO NOT USE silicone caulk for speaker repairs, this is one of those very destructive old codgers tales that does not want to die for some reason. One more thing, if you don't think you can handle fine detail work pass the speaker onto someone who can.
Regards
Arran