Went to my local Homebase tonight for a new lawnmower, while there had a look round the toolbags as I'm in need of replacing the Fat Max bag I've had for the last couple of years. Found this model is on offer just under £23, can't find it on their site so posted a link to the actual bag but on another site.
Stanley Fatmax 1-79-213 Plastic and Fabric Open Tote with Cover 20"
Stanley Fatmax 1-79-213 Plastic and Fabric Open Tote with Cover 20"