Usually, in Britain, overtime pay is time and a half. Or time and three quarters after a certain hour at night. The rates will vary according to any agreements between the management and the workforce/unions.A Saturday may be time and a half, with Sunday and Bank Holidays being double time.Note: time and a half is your normal hourly rate plus another half again per hour worked.In some cases, you may be paid your normal hourly rate, but are given a day off during the following normal working week in lieu.