Great engineering companies that are longer extant.

[TheGreenGoblin]

English Electric..

The English Electric Company Limited was a British industrial manufacturer formed after the armistice of World War I by amalgamating five businesses which, during the war, had been making munitions, armaments and aeroplanes.

It initially specialised in industrial electric motors and transformers, railway locomotives and traction equipment, diesel motors and steam turbines. Its activities were later expanded to include consumer electronics, nuclear reactors, guided missiles, military aircraft and mainframe computers.

Two English Electric aircraft designs became landmarks in British aeronautical engineering; the Canberra or B-57, and the Lightning. In 1960, English Electric Aircraft (40%) merged with Vickers (40%) and Bristol (20%) to form British Aircraft Corporation.

In 1968 English Electric's operations were merged with the combined business employing more than 250,000 people

https://en.m.wikipedia.org/wiki/English_Electric

[TheGreenGoblin]

And of course GEC in no longer extant either...

The General Electric Company, or GEC, was a major UK-based industrial conglomerate involved in consumer and defence electronics, communications, and engineering. The company was founded in 1886, was Britain’s largest private employer with over 250,000 employees in the 1980s, and at its peak in the 1990s, made profits of over £1 billion a year.[1]

In June 1998, GEC sold its share of the joint venture GEC Alsthom on the Paris stock exchange. In December 1999, GEC's defence arm, Marconi Electronic Systems, was sold to British Aerospace, forming BAE Systems.

The rest of GEC, mainly telecommunications equipment manufacturing, continued as Marconi Communications.[2] After buying several US telecoms manufacturers at the top of the market, losses following the bursting of the dot-com bubble in 2001 led to the restructuring in 2003 of Marconi plc into Marconi Corporation plc[3], and in 2005, Ericsson acquired the bulk of Marconi Corporation. What was left of the business was renamed Telent.

[Capetonian]

British Aircraft Corporation
Vickers

Just two that immediately come to mind.

[Pontius Navigator]

For Ian 16th, EMi and British Thomson Houston.

[ian16th]

Robert Stephenson and Company
Stockton and Darlington Railway

[ian16th]

For Ian 16th, EMi and British Thomson Houston.

You forget DECCA and Marconi!

An aside, when I left the RAF Decca offered me employment, but I turned them down. In retrospect, a wise move.

[TheGreenGoblin]

Ferranti

Ferranti or Ferranti International plc was a UK electrical engineering and equipment firm that operated for over a century from 1885 until it went bankrupt in 1993. The company was once a constituent of the FTSE 100 Index.

The firm was known for work in the area of power grid systems and defence electronics. In addition, in 1951 Ferranti began selling the first commercially available computer,[citation needed] the Ferranti Mark 1. The Belgian subsidiary lives on as Ferranti Computer Systems and is now[when?] part of the Nijkerk Holding.

[tango15]

Stothert & Pitt, whose cranes, even today, grace the dockside of ports all over the world.

[CharlieOneSix]

......Ferranti or Ferranti International plc was a UK electrical engineering and equipment firm....

Slight thread drift....not forgetting a subsidary, Ferranti Helicopters, who gave me 6 years of enjoyable employment......

Ferranti-105.jpg (18.71 KiB) Viewed 3998 times

[llondel]

I used to work for EMI, although that was after they stuck a Thorn in it. Now part of Thales, I believe. Taught me that I didn't want to work for a large company, especially a defence company, again.