Guernsey Water monitoring island's sewer network

• Video report by ITV Channel's Kate Prout

Engineers working for Guernsey Water have headed deep into the depths of the island's sewage system to make sure it is working as it should.

They have been using special CCTV cameras, attached to a robot, to examine the walls of the pipeline for damage and decide what sections might need replacing.

The island has 170km of sewer pipes which flow into the Belle Greve water treatment centre.

By surveying and repairing the pipes in this way, rather than replacing them entirely, Guernsey Water can save around a fifth of the cost and reduce the number of road closures around the island.