You must be selected for redundancy on a fair basis. The way individuals are chosen should be clear and consistently applied.
Your employer can take into account a wide range of factors, including job performance, attendance or disciplinary records, skills and experience. The employer also needs to avoid potential discrimination: for example, making all the oldest employees redundant.
So it may be possible for you to be selected for redundancy even though you have more experience — but the employer should be able to show that you were chosen on a fair basis. Your employer also needs to consult with you about your selection and give you the opportunity to object.