Could be copycat but doubtful as there were several too well coordinated incidents for some quickie copycat plan. If it is Al Q as I believe, they're "saying" that despite your enhanced security we can strike you even when your guard is fully up. Disconcerting. What's worst in my opinion is that despite the supposed crackdown on the initial terrorists and associates, there is AT LEAST one other group totally undetected that was able to do a follow-up attack right in the middle of an intense police investigation. Suggests that there's a large, unreported cadre of Islamic jihadists operating in GB. This is not a surprise to those who have been paying attention to Islamic issues.

Fortunately, it look as if several devices were duds with just the ignitors going off. Police are cautious knowing the penchant for follow-up bombs that kill the rescuers.