Who photocopied them, you or him?
You should send the letter and see what happens. Include in the letter that you would also like a reciept for payment made.
I dont think there is any legal obligation to provide you with any reciepts for anything he has supplied to you, the likley hood is that he has bought items at trade discount and not passed the discount on to you, so he has made some profit on the materials, this is common practice.
He should provide you with a reciept for your payment to him.
I understand why you want them, incase there are any warranty claims to be made, but if he made you photo copies of them, then decided he wanted the copies back, then theres little you can do, and to be honest, they are small in the grand scheme of things.
Your priority is getting the work done to an acceptable
standard, you need to write to him detailing the faults and state you are giving him notice to correct them.
If you dont give him this oppertunity you will not succeed at court.
If he fails to get the work sorted, or he does it again to a poor standard you can get someone else in and then persue the cost back through the court.
Like I said, its for you to go to court if he doesnt sort the work out and put your case forward, let him try and convince a judge he didnt come near your house if he is that stupid.
I cannot stress enought that no matter how much you dislike the idea, you must give him the chance to do the work properly. if you dont you wont have a chance of getting any of your money back.
It costs about £50 to persue the matter at court, if you win you will get this back.
If you do win at court, he will be issued with a CCJ, if he doesnt pay up, you have to arrange for it to be enforced.
If you do this via county court baliffs it will cost you another £100, which will be added onto the debt, they will go a few times then give it up as a bad job if they dont get the money.
You can then look at other enforcement options, they are things like attachment of earnings (pointless i think if he's self employed) or getting a lean on any property he owns, then when he sells, the debt is repaid to you, after the mortgage co take their cut.
You can ask the high court to enforce the debt for you if it is over £500, you might get it to over £500 by the time you've had the added court cost, enforcement cost and transfer up fee.
The high court can issue a writ, then you can have a private baliff enforce it, the baliff will charge fee's which are added to the debt. (think baliffs on the TV programs where debts start low but are hiked up with these fees), i've used private baliffs before, they are usually very effective.
I had to take a customer to court for non payment with no reason.
From sending a letter (ignored), to the solicitor sending a letter (ignored), to the court proceedings (ignored), to the county court baliff enforcing the debt (didnt get the money), to the high court issuing a writ (ignored) to the private baliff finally getting the money it took around 8 months, so its a long process, I was lucky in that the customer didnt have a leg to stand on and ignored everything, if she hadnt it would no doubt have taken twice as long.
I've mentioned the above to give you an idea of how long and drawn out it can be, so like I said, send the letter and see what happens.
He might just realise your not going to be fobbed off and agree to sort things out.