Sir Julian Lewis: The people who carry out such attacks are mainly seeking to terrorise the target community, but the people who plan such attacks often have another end in mind, which is to set two communities at each other’s throats. Without revealing anything that one should not about the techniques of the Security Service, can we spare a moment to pay tribute to those members of the Muslim community who bravely go undercover to infiltrate plots of this sort, who are briefly seen in court, often under an assumed name, when convictions are assured, and without whose work many more such plots would succeed than is the case?

[The Minister for Security (Dan Jarvis): The right hon. Gentleman makes a very sage point. I make this point in more general terms, because clearly I am not going to get into the specifics of what happened this morning, but he is right to draw a distinction between those who plan the attacks and those who conduct them. I am beyond proud of the work of our intelligence services, who recruit from lots of different backgrounds in our country. They do extraordinary work. By necessity, they do their work in the shadows, but I know that I speak for the whole House when I say that we owe them a huge debt of gratitude.]