I have started a new contract with my employer (have semi retired so although worked in the same place for many year got a new contract). There are several people at the same grade yet I am the only one who is expected to be flexible on the days/ shifts I do (I am part time). When I asked my employer why one of the others could not take a turn of doing the day people don't want to do, he said that as they had longer contracts they have "historical rights" to days they normally work etc. However none of us have specific days to work in our contracts. Am I write in thinking that we all would adhere to our working terms and conditions and that unless they had of had family friendly contracts or specific days to work in their contracts I am being not treated equally. Is there anything I can look at ie legislations as I am meeting HR and employer very soon to discuss this issue.

And things are so bad now that I have had to give in my notice, but just want to make a point that its unfair, when I am staying late being flexible and other colleagues at the same level not taking their turn of staying late or being expected to change days etc like myself, and the manger is quoting this term "historical rights" just want him to know I am not a walk over.