i have been off work sick because i have hurt my back. i had an attendance review on monday , at the review my employer kept bringing up my diabetes and the control of my diabetes. i wasnt off work because of my diabetes. he has also got my number of sick days wrong he said i have had 27 work days off but i have had 18 days sick which have been covered by sick notes off the gp. i was due to go back to work on saturday but i had a days holiday booked for the saturday so i went into work on the sunday. today my employer told me that i shouldn't have had that days holiday because when you are off sick you have to come into work and do at least 1 shift before taking holidays. my employer has also been talking about me to my co-workers about me having the days holiday. im supposed to be on light duties at the moment as my back is not fully repaired but employer keeps trying to make do lifting that i can't do at the moment. my question is is it right about starting back work before holidays and can my employer ask about my diabetes when i was off with my back?