I guess the beginning of the end was the ill-fated ‘buy a Hoover and get a free airplane ticket to the USA’ marketing fiasco. It wasn’t helped by being the manufacturing base for Sir Clive Sinclair’s C5 ‘car’.
Those two things didn’t help the Hoover brand, and the inevitable globalisation of trade pretty much meant that the day would come when Hoover in Merthyr Tydfil would be no more. It’s going to close at the end of the week.
The brand has entered the language as the word to describe vacuuming - to hoover.