Help: Webley Premier seized up after introduction of neatsfoot oil

[clarky]

Thank you, all, for your assistance.

I have removed the barrel - simple enough. However, I cannot remove the end cap/plug at the end of the pistol (or front of the cylinder, to look at it another way). It appears to be an extremely thin join and there is no means of inserting a screwdriver into any gap to prise it apart. Equally, there is no means of turning it or screwing it, to undo it.

Thus, completely stuck - and not as simple as doing up a shoelace!

How do I remove the end cap?! Clearly, it does not just spring out.

Rgds
A

please do not try to remove the end cap at the rear sight end....you will destroy the gun....it was never meant to be touched after assembly.
Simple use your barrel....the pivot lug ...inserted into the front groove.....obviously its a perfect fit because thats where it operates and simply turn anticlockwise until the spring tension is released .