231. Prior to the commencement of the specified works the undertaker must effect and maintain in place until the completion of all of the specified works, public liability insurance with an insurer in the minimum sum of £10,000,000.00 (ten million pounds) in respect of any one claim against any legal liability for damage loss or injury to any property or any person as a direct result of the execution of specified works or use of the strategic road network by the undertaker.