It may seem early to be thinking of Back To School bargains, but if you're the organised type who liked to get an early start here's another offer to help you out. John Lewis currently have 20% off all Schoolwear, seemingly matching the Marks and Spencer offer, so you can save by buying early.
There's no code needed, as the 20% discount has already been applied to all items of school uniform.
This offer is online now, and it's unclear whether the offer is in stores as well, so I'd be inclined to place the order online to be sure.
Standard delivery costs £3.50 or is free on orders over £50. Click and collect is free on orders over £30, or there's a £2 charge for smaller orders.