From MOD online:
"In accordance with JSP 3614 today the latest JPA renumeration is released for tri-service adoption.
As of 01 Apr 09 all HM forces pay is going to be retained at the normalised rate. That is: the in-toto payment (including payment, additional specialist pay including flying pay and the naturalised pension abatement).
As such, a deduction of the individual's bank account will be made on the last working day of every month to the effect of the pension deductions and additionally the projected claims for the subsequent period.
The overarching result of this costing initiative will result in vast savings necessary for the underpinning of the Armed Forces in this fiscal period.
All personnel should check their bank accounts carefully in the next few days to ensure the appropriate (8% gross) deductions have been made. Any failure to pay the appropriate deductions is tantamount to fraud and will be pursued accordingly.
To claim the standard Armed Forces Payment Due could not be simpler. Log on to JPA, complete your annual assessment with the 3 preferred postings (Alpahbetically denoted) and enter your sub-set of qualifications.
The Claim Armed Forces Payment Due menu will then be unlocked whereby you should provide a list of countries visited and flown over. Also your time at work and reporting periods (do not include secondary duties). Once completed the section on PAYD, Home to Duty and imprest allowance deductions must be forwarded for approval to your line manager. (Do not forget to include receipts for home expenditure: including meals and heating)
After completion the SPWYIO (Standardise Pay What You Is Owe) will be returned to your account within 31 days."
Please cascade as appropriate.