http://www.oft.gov.uk/shared_oft/business_leaflets/general/oft698.pdf
Paragraph 3.42
We are conscious of concerns about reselling items which may raise concerns about hygiene. However, the DSRs do not link cancellation rights with a supplier’s ability to resell items as new
Paragraph 3.44
What constitutes reasonable care depends on a number of things. It may be reasonable for the supplier to stipulate what they consider to be reasonable care, such as not removing hygiene seals on garments or only trying out shoes indoors. But these stipulations cannot restrict a consumer’s reasonable opportunity to inspect and assess the
product. Consumers have the right to cancel even if they fail to take reasonable care of the goods; however the DSRs do give suppliers a right of action against consumers for breach of the statutory duty to take reasonable care.