Should water cannon be used to control protests?
The Met Commissioner has said he's "reluctant" to using water cannon against protesters.
On Tuesday Sir Paul Stephenson told crime reporters he was yet to be persuaded about its use although his senior officers have been discussing its effectiveness with Northern Ireland colleagues.
He said the Met didn't have any water cannon anyway and was against getting into some kind of "arms race" with demonstrators.
"We reviewed its use three years ago," he said. "We did not think it was appropriate then or addressed our problem. We have no intention of using water cannon. I am most reluctant to go down that path. But if we decide to then we would consult the appropriate authorities."
He also raised the controversial tactic of kettling or what the Met prefers to call containment. Interestingly, he noted another potential option in his armoury: banning marches.
He said he had no power to ban demonstrations but could ban a march subject to the Home Secretary's approval.
"We can also apply conditions on a demonstration," he said. "There might be a minority but there is a significant number of people who came with the intent of committing violence."
But he admitted that banning a march could inflame the situation.
What tactics should the Met use to help people exercise their right to peaceful protest but also ensure everyone is safe? Should water cannon be used?
Is kettling an appropriate response? Have the Met been proportionate or heavy-handed?