Licence granted under Section 7 of the Telecommunications Act 1984 : licence granted to Trunked Radio Networks to run telecommunication systems for the provision of private mobile radio telecommunication services within 1 : the area bounded by the M25 motorway 2: the London airports.
Great Britain.Department of Trade and Industry.
Trunked Radio Networks Limited.
[London : The Dept.],
1992.
"3/778/4/37"
Telecommunication