Here is the information you require:
1. Annual Leave
In line with provisions under this Act 1997, the following method must be used to determine annual leave entitlements. Twenty working days annual leave entitlement, where an employee works at least 1,365 hours in the leave year. If the number of hours worked by an employee is less than 1,365, annual leave must be calculated as follows:
- 1.66 days for each month in the leave year in which an employee works at least 117 hours;
Or
- 8% of the hours an employee works in the leave year subject to a maximum of 20 working days per annum.
If more than one of the preceding paragraphs is applicable to an employee, the annual leave to which they are entitled will be whichever is the greater.
2. Public Holiday Payment
Part-time Employees who are not normally rostered to work on a Public/Bank Holiday are entitled to one fifth of the normal weekly rate of remuneration for the Public/Bank Holiday.
In your case, as outlined above, they should receive 3/5ths of a day's pay where the Public Holiday falls outside of staff working days; however over Christmas, Public Holidays will fall on days that you staff work. On these occasions they receive the day off at full pay.