Thank you for your reply, no I've no break in service. Have done preliminary steps in contacting hr definitely good idea. Going to try get response superannuation section but haven't had much luck in attempts in pass, complete silence.
I was going through all my past information on letters received when was given option to buy service that previously wasn't pensionable when temporary and the booklet that was sent said 60 years. I also found a mid career hse pension webinar that's held few times year so gonna sign up for that see if can ask questions in q&a session.thanks again for response.