Are Henley Homes and Genesis responsible for concrete sewer blockage causing chaos in Wembley?

Wembley High Road outside the former Brent House site today

A local resident writes:

Well road closures commenced this morning. After some interrogation I found out that it is allegedly due to Henley Homes and Genesis  Housing, developers of old Brent House site.  Apparently when piling they drilled through a feeder sewer so when they filled with concrete it ran into the main sewer and that has what has caused the blockage.  The main sewer is 7.5 metres down and blocked solid.

On top are three water mains, electrics, gas, telecom, fibre optic.  At the moment they have no idea what they will find as they have just taken up the island created and paid for by Olympic money that had 5 little trees, which have sadly lost their lives.

The reliable source said he anticipated it would take at least sixweeks! (two more than quoted by council) but would not be able to give accurate dates as they have no idea what they will find and what infrastructure may cause them problems until they start digging. 

Hey 7.5 metres is a long way down, and then they will have to tunnel through the concrete.  He did say it might whiff a bit when they get close. Urgh!

Huge problems on High Road traffic, as Ecclestone Place should only be accessible from Wembley Hill Road, and exit via High Road going West.  This was in order to stop it becoming a "rat run" early days but clearly there are a number of drivers who cannot read signs. 

It is clear that TFL have not been so pro-active in closing bus stops and informing locals of the changes.  The main bus stop on high road outside KFC was showing diversions on LED display at the stop, but no signs saying 'bus stop closed' at 4pm today. 

I would like to see the bill Henleys are going to get from Thames Water if they are responsible. Shop keepers, especially opposite Brent House are extremely upset by the disruption - no customers.  The local newsagent told me at 5pm today he had no customers to charge their Oysters or buy drinks/chocolate etc, no school children, and only made £100 by 5pm.  He wanted to know how he would be compensated.  I told him I had no idea whatsoever. Do any readers?