Intensive collaboration be-tween law enforcement agencies on both sides of the Atlantic led to last week's large-scale police action against alleged animal rights extremists in the UK. The US Federal Bureau of Investigation was closely in-volved, as well as European police forces.

Phil Celestini, FBI supervisory special agent, told the Bio conference in Boston that increasingly close transatlantic co-ordination "re-sulted in the arrests we saw last week. And you can bank on there being more [arrests] to come".