The Dyson is operated by squeezing a trigger rather than flicking a switch, which isn’t ideal for longer jobs. But there is no denying its ability – it breezed through our tests. It’s also easy to empty: just press a switch and the dust collection box flips open. The bonus for motorcaravanners is the 12-volt adapter, which allows you to charge it from your ’van’s battery. It is efficient, but we just don’t think it superior enough when compared with the other units to justify its price tag. It is rather bulky, too.