16.1  Notice

If at any time the Contractor becomes aware that there will be or is likely to be a delay in the Works, such that a Start on Site Date or Planned Services Availability Date or a Planned Post Completion Works Acceptance Date may not be achieved, or (following the Planned Services Availability Date) such that there is a delay in the achievement of Services Availability, or (following the Planned Post Completion Works Acceptance Date) such that there is a delay in the achievement of the Post Completion Works Acceptance Date, the Contractor shall as soon as reasonably practicable and in any event within twenty (20) Business Days of becoming aware of the likely delay give notice to the Authority to that effect specifying:

(a)  the reason for the delay or likely delay; and

(b)  an estimate of the likely effect of the delay on the Works including the Start on Site Date, [any Planned Post Completion Works Acceptance Date], or any Planned Services Availability Date or the Longstop Date (taking into account any measures that the Contractor proposes to adopt to mitigate the consequences of the delay in accordance with clause 16.3 (Duty to Mitigate)).