20. Where—
(a)a person was entitled to a superannuation allowance under Part I of the Act of 1937 or an annual pension under the former regulations or a pension under a local Act scheme, or a retirement pension under the 1974 regulations, the 1986 regulations or these regulations,
(b)after becoming so entitled he entered further local government employment,
(c)the pension or allowance was on that account reduced or suspended, and
(d)he dies in the further employment,
any benefits payable in respect of him (except any surviving spouse’s or children’s short-term pension) are to be calculated as if immediately before his death he had become entitled to benefits under Part III of this Schedule.