Qualifying service
D2.—(1) Qualifying service is time that counts for the purpose of ascertaining entitlement to benefits under these Regulations but not for the purpose of calculating them.
(2) Subject to regulation D3, a pensionable employee’s qualifying service is—
(a)any period which he is entitled to reckon as qualifying service by virtue of regulations D10, D11, H8 or J9(1)(b); and
(b)in the case of a person who was at any time from 1st April 1974 until 31st March 1986 or, in the case of a manual worker, at any time from 1st April 1973 until 31st March 1986, in relevant employment as defined in regulation B3(2), any period of service during that time in which the employee was employed for at least 15 hours in a week except—
(i)any period of reckonable service,
(ii)where the employee’s relevant employment was interrupted for 12 months or more, any period of relevant employment occurring before the interruption, and
(iii)in the case of a manual worker, the first 12 months of any period of relevant employment not otherwise excepted; and
(c)any period which he became entitled to reckon as qualifying service by virtue of regulation D2 of the 1974 Regulations.