Unfortunately Derek copyright laws, you may have to account and deliver up any profits you have made from the use of the photos. However, if you have now taken the website down, I would be surprised if any further action would be taken as it would require legal and court costs to be incurred.
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They would write to you and ask you to provide accounts etc if they were to take that course of action.
I would be surprised if they would take any further action if the website has now been removed and you are no longer using the pictures.
I believe that you could, provided you are not copying a patented item.
Any images used must be your own.