According to a study by the Centre for Social Justice, there are 130 websites located in the United Kingdom that offer illegal drugs online through the use of Tor and other tools. The drugs are ordered online and is delivered by mail.
In addition to the number of websites offering drugs, there are more lethal drugs in the country than the number of drugs that are banned. The study found that in 2013 there were 251 potentially lethal substances that were being sold in the United Kingdom. Officially, 231 drugs are banned by the government.
Source: Kristy Buchanan, “Postmen ‘are unwitting drug mules’ as drug dealing goes online,” Daily Express, September 1, 2013.