Decent laptop backpack for just over £6. In-store deal in Tesco, availability will probably vary from store-to-store, I bought mine from Tesco's Glasgow Shettleston branch.
Black Targus laptop backpack with removable notebook compartment is fully cushioned and has a security fastener ensuring your notebook stays firmly in place.
* Removable Padded notebook compartment for screens up to 15.4".
* Hard Wearing nylon exterior with large zippers
* Adjustable fasteners on each side of the backpac ensuring improved comfort
* Side mesh pockets
* Internal divider for work papers for your day out of the office