Hi, I have a term time only contract at work for a job I've been doing since the beginning of the year but I've worked for the organisation for around 8 years. The term time only job was offered to me with five additional weeks paid holiday and I've been using the leave in addition to the school holidays. However now HR are saying they've made a mistake and I shouldn't have the five weeks extra holiday (even though it's been allocated to me on the online holiday booking system at work) and the five week's paid holiday is stated in my contract, offer letter and the job description. They are trying to make me either make up the time for the days I've had off or repay it in money. I think as it's their mistake and I was given the job with the five weeks paid leave that I shouldn't have to do this. Any advice gratefully received.