With more than 80 years of broadcast engineering and operations experience, and more than 20 years of wireless communications infrastructure experience, National Grid Wireless is an acknowledged leader in the design, deployment, ownership and operation of advanced communications and broadcast networks.

In 1997, Castle Transmission International acquired the Home Service Broadcast Transmission Division of the BBC. This division, encompassed the BBC's long tradition of engineering advances in broadcasting and was responsible for shaping much of the technology we currently use to receive television and radio signals.

We have since continued to build on this tradition, having launched the world's first commercial Digital Audio Broadcast (DAB) and Digital Terrestrial Television (DTT) networks in 1998. Today, we own and operate 17 digital and analogue television and radio broadcast transmission networks.

In addition, we also have the rights to two DTT multiplex licences and we are one of the founder shareholders in Freeview.

In 2004 we were acquired by National Grid Transco, a FTSE 25 company with a market capitalisation of circa £15 billion. In line with a change of name for National Grid Transco, to become National Grid in July 2005, we changed our name to National Grid Wireless, in October 2005.

On April 3, 2007, National Grid Wireless Limited and its former Gridcom businesses were purchased by Macquarie UK Broadcast Ventures ("Macquarie") National Grid Wireless Limited and its former Gridcom businesses are now financially and legally independent from National Grid plc and its affiliates. Please click on the following links to find out more information about National Grid plc and Macquarie.

Our customers, broadcasters, mobile and fixed line operators, are now working with a much stronger and diverse partner able to underpin their own plans for network and service evolution.