The Trading Standards department have given me a leaflet from which I have pulled this text for you:
"If the goods are faulty, not as described or of unsatisfactory quality you can ask for a repair or replacement or reject them and get you money back.
Even if you don't find the fault for a while you can usually still claim for a free repair or replacement. Within these rights you may also claim the cost of returning the goods.
If the goods develop a fault within the first six months, it will be assumed that the fault was there when you bought it unless the seller can prove otherwise"
All this is take from a leaflet called "Shopping from home: your distance shopping rights explained"
Hope this helps.