This New York Times story is interesting. It reveals that there was a two hour meeting in London--a kind of international counterintelligence summit meeting--hosted by Scotland Yard and MI5. Almost every European country sent representatives. It is said that this was necessary because the Brits have no leads. It seems clear that everyone thinks the next attack could be in their country. The attacks in London is not seen as the end. London is also working especially closely with Spanish authorities.