Background first - I was building a new PC and chose to buy some of the components from Scan following a friend's recommendation. One of these components turned out to be incompatible with my build (misread the part number and bought a cooler for an AMD board rather than Intel). I tried to return this new, unused cooler to Scan within a 28 day window from my original order date and, lo and behold, a no quibble response of "No, we will not accept a return unless it is defective".
Now, most companies would be interested in trying to attract and retain new custom, particularly since I will likely be upgrading my parts in the future and not just doing this as a one-off thing. Scan, on the other hand, don't seem to be willing to adhere to their poorly worded terms (which, ironically, were meant to encourage goodwill between me and them). I'm now left with a brand new cooler which is all but useless to me, and left about £28 down until I can find someone to sell it on to.
All in all, I recommend that you not use Scan unless you are looking for a one-off purchase and do not care about customer service.
I will also be passing this message on to my friends and family and the other forums I used to review my build to ensure no-one else falls into the same trap as I of shoddy customer service.