Great Britain, like too many other European countries, has imported a 5th column.
And Great Britain has the worst of the worst. For decades, they have let islamic clerics and extremists so vile and violent, they are kicked out of countries like Syria and Egpyt for causing so much trouble, immigrate there all in the name of "human rights" and being labeled "politcal refugees". Not only did they let them and their baby factory wives in, they provide them with free housing, endless welfare, and let them setup islamic schools and mosques preaching hate and death to all non-muslims all day and all night.
It doesn't surprise me in the least that Britian is seeing so many attempted attacks right in their backyards.