The vacuum cleaner has a container where the dust is gathered so you don't have to buy any vacuum cleaner bags.
Robert Dyas
Stanley FatMax V20 18V 7.5L Wet/Dry Vacuum - Bare Machine
Homebase
STANLEY FATMAX 18V V20 7.5L Wet and Dry Vac (battery not included)
Wickes
Stanley FatMax® V20 SFMCV002B-XJ 18V Cordless Wet & Dry Vacuum Cleaner 7.5L- Bare