For me as a person who is often in London on business, a good question is whether these were suicide attacks or whether there is an active service unit still running around out there?
With the IRA, one bomb meant an active service unit had gone live on the mainland and consequently, further incidents.
In a city the size of London, could both be true? It seems to me with all the trouble they've had with so-called imams over the past few years that there are bound to be active cells -- and those cells might have placed the suicide bombers. From what I've heard, though -- and this is purely guesswork at this point -- some people are leaning towards bomb packages.