SW London.
It happens quite a bit, usually when trying to get the top out if the top is worn and the catches that hold the various bars in place don't function as intended, ie they allow things to release too soon before the top is out of the box. Do a search on the site and you'll see how many folk have been caught out.
If you can, push the top back in to the box fully. When correctly stowed, and with the help of another who's prepared to get their knuckles grazed, lift the top out again by the lowest bow, ie the one with the stud that locates into the hole on the soft top box lid when the top is up. It will be pretty hard to pull the top out this way, and as you do it the top will start to unfold as the various levers do their thing, but it should come out. It is a tight fit to get your hand in there, but with one person on each side, and providing the top has been pressed back into its proper stowage position, it should come out fine.
Let us know how you get on.
JH