Rogue traders who will flat out refuse to accept any responsibility whatsoever for the product they sell you. If it arrives faulty and thereby unfit for purpose they will do their utmost to 'kick the can down the road' rather than simply and honestly adhering to The UK's online and distance selling laws and regulations. They will use a host of nefarious practices to try and confuse and intimidate the customer and deliberately over-complicate the returns process in order to avoid fulfilling their legal obligations as an online retailer. Please do not make the same mistake as me and steer well clear of these charlatans. A few extra pounds spent at a reputable retailer will save you so much more time, trouble and even cash in the long run.