In reply to gethin_allen:
The impression I get is that even if it was the best photo they had ever seen in their lives, they were still only going to offer £100 (or try to get it for nothing, as was originally the case).
The expenditure of buying and maintaining equipment, the persons time, travel to the photo shoot, etc, etc all need to be factored into the cost of the photo. The perception with photography seems to be that since "its only a photo", and everyone has a camera these days, then why should much be paid for it? I guess people trying to get the photo for peanuts should just head out and take a photo themselves and see if it is good enough to be used for such a campaign.