If you trawl through all this, I think it says whatever is written in the T&C's?
http://www.oft.gov.uk/shared_oft/busine ... oft698.pdf
This is from Which:
Who pays return postage?
The seller's terms and conditions or returns policy should state who pays the cost of returning goods.
If they don't state this, then the seller has to cover the cost.
In this case, you're entitled to a refund of the total amount you paid, including any charge to ship the goods to you. No admin or restocking fees should be charged.
If the seller wants to send substitute goods, because they don't have the items you wanted in stock, it should say so before you place your order.
The cost of returning substitutes should always be at the seller’s expense.
Returning faulty goods
If you receive faulty goods and wish to return them, The Distance Selling Regulations are in addition to your other legal rights.
So, if your goods are faulty and don’t do what they're supposed to, or don’t match the description given, you have the same consumer rights under the Sale of Goods Act as you have when buying face to face.
Any terms and conditions that say you must cover the cost of returning an item wouldn’t apply where the goods being returned are faulty.
Rod