It was not turning in the handle (at all - stuck fast).....but today - I was not to be defeated!
I got a little movement and the lock activators moving in and out a mm or so - so I just kept turning the key a little more with a bit more forcem - and poured 3 in 1 penetrating oil in through the various orifices - and applied more pressure....
Then put the handle with the key in the vice - and moved the handle - which gives more leverage - and then back to the va.
I managed to get enough movement to see the locking knob was being moved - but not enough to activate it...so back to the vice....and eventually - I gave it that little bit extra - and whoosh - around it wen t.........and out came the barrel (with key still in fortunatley - although my little rectangoles were going no-where). The pics above look clean compared with what came out of mine - there was a mm layer of crud along both sides of the springy slices - explaining why it wasn't turning - and many of the slices are stuck - so am now persuading them out - without getting them out of order.....
AT last - perseverance pays off.
![OK! :ok](./images/smilies/ok.gif)