An officer who is unfit for duty through sickness whilst on a period of annual leave can claim the leave back. The Force has recently changed its policy so that no certificate is required if your period off work is less than 7 days. You can claim back annual leave retrospectively but this is NOT allowed with TOIL or Freed Days. You must notify the force that you are sick BEFORE the day you have TOIL booked. The day can then be reallocated.