2. For the purposes of paragraph 93(4) of Schedule 4 to the Post Office Act 1969 the following classes of land shall, in relation to the Post Office, be specified as “operational land”, namely land of the Post Office used by it or in which an interest is held by it for any of the following purposes:—
(a)a postal sorting office;
(b)a postmen's delivery office;
(c)the housing or supporting of apparatus used for the operation of the Post Office telecommunication services excluding therefrom the storage of such apparatus where such storage is the only purpose.