THE complex challenge to repair a sink hole in Knutsford has been extended and moved further underground.

Workmen have now dug up land in library gardens.

Engineers started to mend the big cavity on Toft Road between the Curzon cinema and the railway station early in September.

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The sink hole has plagued the town for three years as it kept reappearing.

The ‘unusually complex’ repair was expected to take two months but has hit technical problems, as reported by the Guardian.

It could now be mid-November before the giant hole is finally fixed.

The problem has been exacerbated because the collapsed pavement is above an underground tunnel.

It is understood that the link was built to transport prisoners under the road when the Courthouse was a gaol, in the early 19th century.

A spokesman for Knutsford Town Council said: “The works currently happening in the library gardens are related to the ongoing repair works to the sink hole on Toft Road.

“They are scheduled to last two weeks and are planned to be completed in time for Remembrance Sunday.”

United Utilities and Cheshire East Council have reassured residents and motorists that this issue ‘will be resolved soon’.

A spokesman for United Utilities said: ”The work to repair a sink hole on Toft Road has been complex, with challenges around an old tunnel, the weather and ground conditions.

“A design has been agreed with Cheshire East Council and our engineers are working hard to have everything completed around mid-November.”