mjh1

Hello all, please could anyone help me with an issue I have with my old rifle? It goes through the motions of cocking okay but will not click "home" so I can fire it. It looks like a trigger issue but I don't really know where to start or indeed if there are parts missing (it's been in my brothers garage for years and I've just got it back). Any ideas on where I can find an exploded diagram anyone? Thanks in advance, Mike.