Thought I'd update this....I didn't have time so a friendly garage fitted the new master cylinder and slave cylinder. They thought it wasn't right still and I agree it'll need a clutch at some point soon, but after some usage and pumping the pedal feels so much better now. Don't have to ram my foot through the floor to change gear. As its a pre filled system it obviously had some air in when the garage fitted it.
Edit....updated the wrong post
