It appears to be Rowan Williams talking recently about the Covenant and recorded in an echoing church. It certainly seems to have been edited - I can't image that Williams would really say or think that 'it's going to solve all our problems' - but it's not clear how much editing has been done. I wouldn't be at all surprised to find that the original contained considerably more caveats and cautions.
As it is Rowan talks about the Covenant as a 'constitution', with 'punishments and sanctions'. Some of us have been saying this for some time but as a bad thing.
But I would like to see (or at least hear) the original before putting too much weight on it.
Added later from email correspondence:
It is from the speech to the General Synod in November, with the ‘nots’ removed!
All the same, it makes a point.