All staff should benefit, proportionately, from a bank holiday. For TTO (Term-Time Only) employees, their holiday pay, including their pro-rata entitlement to bank holidays, is included in their annual salary and spread over the year to provide a constant income.
If an employee is not scheduled to work at all on the Monday, there is no requirement to give additional time off since TTO support staff are already paid their pro-rata entitlement of bank holidays.
However, if the employee usually works more than one-fifth of their weekly working hours on Mondays, they 'owe' their school the difference between the bank holiday entitlement and the hours normally worked. This time should be made up by the employee, as determined locally by the school. For example, an employee working 15 hours a week (7 hours Monday, 4 hours Tuesday, 4 hours Wednesday) is entitled to 3 hours of bank holiday pay. Since they work more on Mondays, they will need to make up the 4-hour difference.
Conversely, if the employee normally works less than one-fifth of their weekly hours on Mondays, they should be 'credited' with the difference. For example, an employee working 15 hours a week (2 hours Monday, 7 hours Tuesday, 6 hours Wednesday) is entitled to 3 hours of bank holiday pay. Since they work less on Mondays, they will be entitled to 1 hour off.