Letter boxes for sale in the UK. A large choice of lockable, secure, weatherproof letterboxes and postboxes available with and without personalisation. We provide our letterboxes to B&Q so you can buy spare keys and accessories. Included in our range of postboxes are wall mounted letter boxes, metal letterboxes, plastic letterboxes and coloured letterboxes in green, red, cream, buttermilk and silver. All of our letterboxes are suitable for outdoor use in domestic homes and business premises.