Why is the final salary pay used in the statement lower than the career average pensionable pay?

Question:
Why is the final salary pay used in the statement lower than the career average pensionable pay?
Answer:

Your career average pensionable pay includes any contractual and non-contractual overtime, whereas your final salary pay only includes contractual overtime.

If you disagree with the pay figures disclosed on your statement, you should contact your employer's payroll section for further clarification.