Crackdown on illegal prescription drugs trade
More than £2 million worth of illegal prescription drugs like Valium and Viagra have been seized in the UK as part of an international crackdown on the trade.
There is also concern about the growing number of drugs for cancer, heart conditions and depression that can be bought online.
The BBC was given exclusive access to one raid on an illegal operation in Brighton.
Danny Lee-Frost, head of operations for the Medicines and Healthcare products Regulatory Agency (MHRA) described what investigators were looking for.