She reminds me so much of her I had to look at the wiki page.
Character synopsis
Hyacinth is a
social-climbing snob who constantly aims to impress people, particularly of the upper and upper-middle classes, and to give the impression that she is of high social standing, despite her modest status. This is epitomised in her pronunciation of her name as "
Bouquet". She has an "acquired cultured
accent which buckles under stress."
[1]
The character's creator,
Roy Clarke, has called her the "least invented of all the characters I've found in my head":