“existing works—

• “(a) means any works relating to the provision of telecommunications under the Post Office Act 1959 (or any former Act) that were wholly or partly in existence, or for which work on the construction, erection, or laying commenced, before 1 January 1988; and

• “(b) includes, for the purposes of subpart 2 of Part 4, any works relating to any conveyance that constitutes broadcasting under the Post Office Act 1959 (or any former Act) that were wholly or partly in existence, or for which work on the construction, erection, or laying commenced, before 1 January 1988; but

• “(c) does not include any works that, after that date, have been altered or moved or added to in a way that substantially alters their character or location, as the case may be”.

“telecommunication—

• “(a) means the conveyance by electromagnetic means from one device to another of any encrypted or non-encrypted sign, signal, impulse, writing, image, sound, instruction, information, or intelligence of any nature, whether for the information of any person using the device or not; and

• “(b) for the purposes of subpart 2 of Part 4, includes any conveyance that constitutes broadcasting; but

• “(c) for all other purposes, does not include any conveyance that constitutes broadcasting”.