I find myself in the eerie and entirely unpleasant position of having to disagree with Gromit whilst simultaneously having to concur with AOG.
Per capita, Antigua has more murders than the UK.
However, this is where I claw back from respectability. You can't extrapolate Antigua's figures then compare them to the UK. What would be much fairer, would be to compare Antigua's annual murder rate to, say, that of a comparable town or city in the UK.
Simple extrapolation masks social/economic drivers. You'd need to compare like for like.
If you compared Antigua to say, parts of the East End of London, South London, Manchester or Glasgow, I suspect we'd see our fine British murderers trouncing these upstart Antiguans.
We may not make much of a showing in the World Cup or the Olympics, but by gum, we lead the world in murder (Did you know that up until a couple of years ago, Nottingham was the murder capital of the UK?)