I’m a NHS employee at one of the lower points of my pay band, in a specialist role. A new starter has the same job title as me although has very limited experience. He has come from another organisation and was the same band as me at that organisation, doing an entirely different (irrelevant) role. He has moved to my organisation to do this specialist role which he has absolutely no experience of (not a problem at all - it’s very much a case of learning on the job, which is what I did). He is at the top of this pay band; earning £5k more than me. I am expected to directly train him. I know this is how pay bands work and I know my manager can’t decrease his pay or up mine, but AIBU for being annoyed at having to be responsible for training up someone who earns more than me?