Chrome Barrage Cargo backpack

£170, chromeindustries.com

It’s a serious wedge of cash, but the Barrage Cargo is a serious backpack – the sort that would survive a war zone as well as year-round commuting. It’s completely waterproof for a start, made from the same fabrics the SAS probably uses for bed sheets, and it features all the essential pockets.

The main section is an 18-litre (expandable to 22-litre) rolltop. Inside is a laptop sleeve, while outside there are side pouches for a water bottle or D-lock, plus a zip pocket for smaller items. Finally there’s expandable webbing to stow a helmet, shoes or your wind-up field radio, and it’s all rounded off with sturdy, comfortable straps.