From another page on nemesis’ link;
When you buy goods online you have additional rights to return them.
This is because your decision may be based on a brief description or a photograph – so what you receive isn’t always quite what you’d expected.
The Consumer Contracts Regulations replaced the Distance Selling Regulations in June 2014.
Under the Distance Selling Regulations, you had the right to return your order up to seven days from the day after you receive your goods.
The Consumer Contracts Regulations extend this right to 14 days from the day you receive your goods.
Many online retailers extend this even further so be sure to read the terms and conditions carefully as you may have longer to return unwanted items
Did he pay by credit card?