Lack of consultation by the powers that be could have led to damaged habitats, members of the community association which runs Hardings Pits will hear at their AGM.

In a report to members of the Hardings Pits Community Association, its chairman Jane Dearling said: 'Work began upon the bus route running along the eastern edge of the Green in the summer of 2010.

'Pre-development surveys had suggested the presence of the common lizard within the works corridor – and ecologists used our site for compensatory works.

'Unfortunately we were not allowed to liaise on this and at least one of the new lizard refuge areas was constructed in the middle of a path.'

Scrub willow was also removed during work on the road scheme - despite the fact the felling was not included on the plans.

Association members fear this has remmoved habitat for birds such as willow warbler and chiff-chaff. Mrs Dearling adds: 'Our concerns fell on deaf ears. The road itself was completed just in time to meet the deadline imposed by the government grant which has paid for it.'

The annual report says the proposed King's Lynn marina remains 'as far away as ever'. At one point, there were fears the River Nar would be diverted across Hardings Pits as part of the scheme.

Mrs Dearling's report says council contractors created an eyesore whilst dealing with two small areas of Japanese knotweed.

'At great expense their contractors have totally eradicated all vegetation in these areas and fenced them off,' it says.

'We will be interested to see if this results in long term removal of knotweed – but it has certainly made a temporary eyesore within the site.'

A 'substantial quantity' of equipment was stolen from a storage container in the reserve in February.

Officials believe the lock was picked.

'Precautions to prevent a further break-in have been taken,' Mrs dearling adds.

'The equipment was uninsured due to the isolated location of the container.'

An application to register the reserve as a town green under the Commons Act is still in progress.

Five work days were held through the summer and autumn and much useful work was achieved.

The AGM is being held in the meeting room at Hillington Square on Monday, May 16 (7.30pm).