Views of Liverpool from New Brighton beach (Image: Peter Byrne/PA Wire)

£11m will be spent investigating the sewer network under Liverpool, Bromborough, and Birkenhead . United Utilities said the work was to better understand issues as the water company looks to cut down on the number of sewage spills.

Roughly 85% of sewers in Merseyside are combined sewers. This means rainwater combines with sewage when draining away, leading to more sewage spills in effort to stop waste backing up into people’s homes.

The details of the investigation were revealed during a discussio n over plans to dig up three roads in Wirral at a Wirral Council environment committee meeting on December 2.

United Utilities, in partnership with the council, is looking to develop Beryl Road, Noctorum Avenue,

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