A Thames Water spokesperson responding to my request regarding progress on the Wembley
High Road sewer works and their investigation into the source of the concrete blockage, today told me:
We are now halfway through clearing the blockage, and have replaced five metres of pipe which has been damaged. We expect that the rest of the blockage will take two more weeks to clear.
We are still investigating the source of the blockage and have not identified who it might be, and will let you know when we have any details.