The decision was made in anticipation of certain retirements in applied maths around that time.
From October 2006, compulsory retirement below age 65 is unlawful you would need to justify any enforced retirements below that age.
The SFO is currently within the target set for small departments for ill-health retirements.
With lengthier life spans, comes longer retirements.
Top Retirements provides a guide for retirees and prospective retirees that includes facts and comprehensive information on each state.