Behind the western embankment, a 200-strong workforce is making great progress in building the new extension to the works - which will significantly reduce partially-treated sewage overflowing into the River Thames following heavy rain.

Around three-quarters of the foundations for the additional treatment tanks are now complete, and we are nearly half way through building the concrete structures. This means we will soon be able to install the machinery which will make these tanks work.

We have started using the gravel stored in the north-west corner of the site, near Worton Industrial Estate, to fill around the new structures. We plan to start using the remaining soil temporarily stored on top of the embankment in spring 2012, which will reduce the embankment to its final height by the end of next year.

During July we will start the final sections of foundation work. This will continue into the autumn, with short intermittent breaks throughout this period. As this activity involves hammering concrete piles into the ground, it can generate noise and vibration, which we will monitor closely and keep to an absolute minimum.