You reported Thames Water's plan to spend £2bn on a tunnel which reaches depths of 80m (NCE, 29 March).
As a practicing sewerage engineer for over 30 years I have always hated the idea of pumping large volumes of flow on the grounds of cost.
Now, however, we have another even more pressing reason to avoid this. Has anyone, I wonder, assessed the whole-life carbon footprint of such a scheme? As OFWAT apparently believes it is unnecessary I expect to see much debate taking place on your pages or reported in them before the scheme gets the go-ahead.
On another point, regarding last week's headline 'Yorkshire closes sewage works', as a resident of Yorkshire I sincerely hope that Yorkshire Water's project manager knows the difference between a sewage works and a water treatment works more thoroughly than you do!
Howard Glenn, Howard.Glenn@calderdale. gov. uk