Loose joint pins in my experience on British gun have almost always had the pin entered from the left hand side ,be it knock in or screw . If you look at the cover plates/caps on the action sides you will see that the left is usually bigger than the right . A knock in pin is mainly parallel but with a slight taper on the leading edge.
With British guns you can never take anything as a hard and fast rule as different makes made their own variations and mistakes did occur that were "corrected" so again a variation from the norm
