They CAN NOT charge you for ANY of it !! What happened was 'Normal wear and tear' The Owners are responcible for repairing it !!
However this is a VERY VERY common way to try and con tax free money out of unsuspecting guests !! Also unfortunately it often works !
Send the bill back and tell them to use The Small Claims Court if they really have a problem ! I bet a £ to a penny, you will here no more !
This happened to me , but I knew the people who had stayed there the week before us! I contacted them and they confirmed that they had had the EXACT same bill word for word ! This is so common because there is NO TAX on repair payments , but there IS on rental income !