I have been working in a support role in a university since January 2014. My contract is permanent, open ended, for 17.5 hours a week. I shared the job with another member of staff on the same grade who also worked part-time but the job is not formally a job share. In August 2016 the other staff member left and was not replaced and I agreed to temporarily take on 6 hours a week (this suited me and I was happy to do it). Since August 2016 my additional hours have been extended every 6 months. I had a vague understanding that when I had been doing these additional hours continuously for 2 years then my employer would legally have to make them a permanent part of my contract (which I would like) but I have just been told that this is not the case as "you are on a permanent and not a fixed-term contract". Do any HR/legal people know if that is true or do I have the right for these hours to be made permanent, once I've been doing them for 2 years?