British law enforcement and intelligence agencies have contributed for years to a secret NATO “kill list” of suspected terrorists and drug traffickers, according to a new report.

Evidence drawn from court and from documents leaked by Edward Snowden, which has been compiled in a 50-page report by human rights charity Reprieve, indicates that Britain has been a key partner for the US in drawing up targets for extra-judicial killings in drone and aircraft strikes in Afghanistan and Pakistan, which have killed civilians.

The claims pile pressure on the UK government to explain its role in secret kill-or-capture lists, understood to inform special operations, following revelations published by VICE News on Thursday that UK intelligence contributed to a kill list in Yemen. Former US ambassador to Yemen Stephen Seche was among a number of officials who told VICE News that British sources helped compile a “targeting list” in the region.

Now two senior British members of parliament (MPs) have called for an inquiry into Britain’s role in the assassination lists.