Extensive investigations, archaeological excavations and surveys were commissioned by Cheshire West and Chester Council to inform the programme of repairs and restoration for the structure. The proposals have been designed in full by Ramboll Structural Engineers in consultation with Historic England.  Scheduled Monument and Listed Building Consent have been secured to implement the proposals.

The work will extend over several months with anticipated completion in late summer 2016. The work will be phased to minimise disruption during the construction process. it is hoped that the entrance will remain open for the majority of the works.  There will be short periods of time when the entrance will be closed for public safety, during which the exit will be utilised as an entrance and exit as per previous times when the entrance has been closed off.

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