Calum:
The Electrolux 2-in-1 design Jamie is talking about is readily available on eBay, as well as replacement bristle inserts. It fits most standard wands.
Over here, Hoover was the company that started with the BBQ-grill-cleaner bristles on dusting brushes. They should have found themselves out of business over such a poor design, but there is no limit to the gullibility of the American public. Hoover was once a fine brand name, so the stuff they make today must be good too, right?
NOT. But fools rush to buy their wares anyway.