The Local Government Superannuation Regulations 1986

11.  The value of the share of the fund to which the scheme managers of the approved non-local government scheme are entitled shall be calculated in accordance with the formula:

V = W ×  [ X - (Y + Z) ] 

, where—

V is the value of the share of the fund to which the scheme managers are entitled,

W is the apportionment fraction specified in the actuary's report,

X is the value (determined by the fund's actuary) at the apportionment date of the transferable assets which still belong to the fund at that date and any other assets which belong to the fund at that date which represent in any form or have accrued from any transferable asset,

Y is the total of any sums due from the fund at the relevant date and still outstanding at the apportionment date, and

Z is the total of any sums due from the fund at the apportionment date (but not at the relevant date) in respect of any expenditure in connection with the transferable assets of the fund or assets representing or accruing from those assets.