If they didn't perish in the bombs they are still out there somewhere or have left the country.

Our concern would be if the demonstration turns into riots or damage and we have got to be prepared to deal with that.

All the police forces of London are all working together to keep London safe.

We say that London is open for business. If we don't do that, then the terrorists will have won and that's not what we want.

We have a severe fire in one of those carriages, with tremendous devastation in there, ... And we face some considerable challenges as far as identification of the numbers who are in there and the identification of anything that remains in there.

It is increasingly clear that there is very little else to recover from the scene.

It is unprecedented, but equally these are unprecedented times. These are the biggest threats that London has ever faced in peacetime.

There are additional bodies ... ... We think there may well be further fatalities.

Crime officers...are now combing the site looking for evidence to find out what happened.