A British 'kill list' does exist. We used it in Afghanistan - Spectator Blogs:
They’re making a list, they’re checking it twice – and Number 10 will know whether you’ve been naughty or nice. And if you’ve been very naughty, you’d better watch out for a metallic glint in the sky. Britain doesn’t have anything called a ‘kill list’, but it does have something called‘JPEL’ – whose existence the government will neither confirm nor deny.