You can work out how many days off you should get by multiplying the number of days you work each week by 5.6.
For example, workers who are contracted to work five days a week must get at least 28 days off a year (i.e. 5 days x 5.6) including public holidays. If you are contracted to work three days a week, your leave entitlement will be 16.8 days off a year (i.e. 3 days x 5.6).
Many people have contractual entitlements that are much better than the statutory minimum. The average GB full-time worker gets 25 days of annual leave plus eight bank holidays. Trade union members tend to do better than those who aren't members. Comparing like-for-like across occupations, industries, and public and private sectors, the average union member gets two days more leave per annum than comparable non-members.