I have worked in the company for 5 years, her 10 both in basic admin roles.
I have always worked the same full time hours of 40 a week. I used to be in the same department as said colleague but recently took a 'promotion' of sorts that has moved me into another department where I am undergoing training and a distance learning course. After completion I have been told there will be a pay increase. This was open to everyone to apply to but only 2 people applied and said colleague did not.
So onto my work colleague, they have worked there for 10 years, started out as full time then understandably she moved to part time after the birth of her second child. She now works almost half of my hours but at every chance she gets brings up that she should be on more money than me as she's been with the company longer.
I try to explain that with me being full time I obviously will earn more but that if she did the same hours we would be on the same (until after my training) she still thinks this is unfair and that even on her part time hours she should be bringing home more than me because of years of service alone.
She won't stop, we can be taking about anything and yet she manages to bring it back to wages. In so fed up of it, I've tried telling her I don't want to discuss it any more but she doesn't stop.
Just an additional fyi she only knows my wages as the company like to boast about giving every admin the same national living wage at any opportunity.