Critics have blasted the government's plan to build a 10-metre-wide moat around its Tamar headquarters, accusing the administration of building a 'castle' to keep the public as far away as possible. Civic Party vice-chairman Albert Lai Kwong-tak called on the government to release the confidential tender documents that outline the specifications of the planned building works, which were given to four developers on Friday. 'The chief executive himself has claimed and promised that this would be a civic centre for the people. How can it be a civic centre for the people when you have a moat stopping people from accessing the complex itself?' Mr Lai said. The document states: 'Within the Open Space, there should be a strip of amenity space of water surface [preferably], and/or grassland, and/or fountain-features, etc, to separate the Central Government Complex, for which access may be restricted from time to time, from the rest of the Open Space which will be designated for use of the public.' It stipulates that the strip should be at least 10 metres wide and designed to 'promote visual enjoyment and to discourage unscrupulous intrusion into the space'. 'What are they trying to do? Turn it into a castle? Will there be a drawbridge?' Civic Party legislator Audrey Eu Yuet-mee said. The moat concept was ridiculed by one security expert, who said the government should do more to deal with terrorism risks than protesters. Phil Curlewis, director of security consultancy Abate Risk, said: 'If Tamar still goes ahead with an underpass for traffic underneath it, all you have to do is drive under it with a huge truck bomb and you'd take the whole building complex down.' Paul Zimmerman, convenor of the group Designing Hong Kong Harbour District, said: 'For the specifications to go out and not be shown to the Legislative Council or the public for comment, and only to be sent to the contractors, that is what everyone is aghast about.' Tenders must be submitted by January.