#dolphin update. The porpoises seem happy enough. They are surfacing regularly and are staying in the Westminster area. No good pics yet.
The latest sightings indicate that the pod is continuing to move upstream towards Battersea Station in London's south zone.
"They should be fine, they can find their way up river and go back down again. As soon as they've had their fill of fish they will find their way back out."
UPDATE: London's Marine Policing Unit released this first photo of one of the porpoises.