High Speed Rail (London - West Midlands) Act 2017

56 (1) If by reason of the construction of any specified work or of the failure of any such work the efficiency of any drainage work for flood defence purposes is impaired, or that work is otherwise damaged, so as to require remedial action, such impairment or damage must be made good by the nominated undertaker to the reasonable satisfaction of the drainage authority and if the nominated undertaker fails to do so, the drainage authority may make good the same and recover from the nominated undertaker the expense reasonably incurred by it in doing so.

(2) In any case where immediate action by the drainage authority is reasonably required in order to secure that the imminent flood risk is avoided or reduced, the drainage authority may take such steps as are reasonable for the purpose, and may recover from the nominated undertaker the reasonable cost of so doing provided that notice specifying those steps is served on the nominated undertaker as soon as reasonably practicable after the drainage authority has taken, or commenced to take, the steps specified in the notice.

(3) Nothing in paragraphs 54, 55 or 56 authorises the drainage authority to execute works on or affecting an operational railway without the prior consent in writing of the nominated undertaker, such consent not to be unreasonably withheld.