In the early 1990s, Pakistan introduced the Bonded Labour System (Abolition) Act, including imprisonment and fines for offenders, and in the past has responded to CNN's reporting on the issue by listing the practical measures it's taken to protect workers.

CNN: 'Humans of New York' takes on bonded labor in Pakistan

HMRC's Andy Leggett told File on 4 that British-brewed lagers have become favourites for smugglers who use bonded warehouses and the long-established system which allows duty to be suspended until they are sold into the market.

BBC: Calling time on alcohol smuggling and drinks duty fraud