(ii) a telecommunication facility, if the use is ancillary to the use in subparagraph (i); but
(b) does not include the use of premises for a supply network or private electricity works stated in the Planning Regulation 2017, schedule 6 [Development local categorising instrument is prohibited…], section 26(5), unless the use involves—
(i) a new zone substation or bulk supply substation; or
(ii) the augmentation of a zone substation or bulk supply substation that significantly increases the input or output standard voltage.
