Then the Air Force was rocked by the biggest procurement scandal in a generation, losing much of its authority to buy weapons.

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For example, in a traditional schools procurement an "input" approach is taken - the authority would specify the number and size of classrooms, the size of the dining area and games hall.

BBC: How private bids work

After an almost two year procurement process and months of infrastructure assessments and security validations, Authority to Operate (ATO) certifications will be granted next month.

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The SNP group on Glasgow City Council has lodged a motion calling on the local authority to "invite Audit Scotland to investigate whether councillors unduly influenced the procurement process in the case of the George Square redevelopment procurement process".

BBC: Gordon Matheson investigated over George Square revamp