The definitions are in the original act here: http://www.legislation.gov.uk/ukpga/2016/25/section/261/enacted http://www.legislation.gov.uk/ukpga/2016/25/sectio

The definitions are in the original act here: http://www.legislation.gov.uk/ukpga/2016/25/section/261/enacted http://www.legislation.gov.uk/ukpga/2016/25/section/261/enac... It's very broad: A 'telecommunications operator' is somebody who "offers or provides a telecommunications service to persons in the United Kingdom". A "'Telecommunications service' means any service that consists in the provision of access to, and of facilities for making use of, any telecommunication system ". And a "'Telecommunication system' means a system that exists for the purpose of facilitating the transmission of communications by any means involving the use of electrical or electromagnetic energy."