But one people couldn’t progress north any further every one just turned back anyway.

My experience on the ground was that it seemed people at the very north end of the march actually were told by police to start going back - or at least given a message that could be interpreted that way. Nobody at my part of the march started moving south again until people started coming back from the north end saying that we'd been told to go back. I could be wrong about all this, but if there's any truth to that interpretation of events then we might hear more about it in the next few days.