I am currently on a Tier 2 restricted visa from the occupational shortage list. Can I work in a different role with the same employer that is not on the occupational shortage list but something similar?

My process was quite tedious as the person in HR of my company, I found out, did not know what they were doing really. The first time i applied my tier 5 had not expired yet. It does not matter because it was going to expire soon and if you get a new visa, the previous one becomes invalid. However,...