Defunct technology companies of the United Kingdom

2013–2018 British political consulting firm

former company

defence arm of the defunct General Electric Company (1897-1999)

former Franco-British aerospace company

thumb|upright|A Mullard TDD4 valve. The gold spray coating served no purpose other than to hide the blackened interior, as Mullard valves were still manufactured using the azide process, long abandoned by other makers. upright|thumb|A Mullard EL34 power pentode thumb|An EL84 valve made in Russia in the 21st century

Kazam was a UK based smartphone brand established in 2013 by former HTC employees. The brand gathered publicity by offering free screen replacements for their products.