It’s important to be aware of significant dates such as employee birthdays to ensure people are paid at or above the correct minimum wage for their age. There are also rules about rates for different types of work, such as piece work, and holiday pay entitlements. Further explanation can be found at: https://www.gov.uk/holiday-entitlement-rights.
If you have been using the minimum wage system since its inception are you aware that since 2010 there has been a separate rate for apprentices that applies from ages 16 to 18 or to apprentices aged 19 and over in their first year of apprenticeship? After that year, the normal age-related minimum wage applies.
Employers with queries about the national minimum wage system should find the answers at: https://www.gov.uk/national-minimum-wage.