Hyacinth
Onslow actually did have a Hoover Junior, in fact, I believe the handle was sometimes seen. He also had an Electrolux cyclinder of some type.
It was funny how Hyacinth was the only one out of her, Onslow/Daisy and Elizabeth to never have a vacuum shown. Liz had a Goblin I believe.
This is not to put down Dyson in any way, but I think it's funny. There's an episode where Hyacinth is giving a dimensioned drawing to someone and she says something like, "the measurements are in feet and inches, I don't hold well to the metric system and all that EC channel tunnel nonsense." She was referencing the new at the time "chunnel" or channel tunnel.
Anyway, I could totally see the traditional Hyacinth going to a store looking for bags for her vacuum (whatever it may be) and saying, "I have a bagged vacuum of course, I don't hold all that well to all this DC dual cyclonic stuff."
Again, I am not knocking Dyson, I do like them and especially the DC01 that would have been coming out while the series was on, it's just that quote totally popped into my head as something she could say.