They're focusing their ire on Israel so we shouldn't see another 7/7 anytime soon. Hopefully. I wouldn't be surprised if the terror threat level was raised to servere after this.
On another note north London has a large Jewish community, mostly based in Hendon and Tottenham. North London is also home to many undesirable groups, and the Jews are currently getting targeted.
Islamists only know how to fight death wars, running at their enemies like a rabid dog, destroying anything they percive as in their way. Western Europe needs to be on high alert going forward, I know at least so15 is.