# Channel Tunnel Act 1987, Paragraph 5


(1) The appropriate authority shall indemnify the drainage authority from all claims, demands, proceedings, costs, damages and expenses which may be made or taken against, or recovered from or incurred by, the drainage authority by reason or in consequence of—
(a) any damage to any drainage work so as to impair its efficiency for the purposes of land drainage; or
(b) any raising of the water table in lands adjoining the works authorised by this Act or any sewers, drains or watercourses; or
(c) any flooding or increased flooding of any such lands;
which may be caused by or result from the construction of any work authorised by this Act or any act or omission of the appropriate authority, their contractors, agents, workmen or servants whilst engaged upon the work.
(2) The drainage authority shall give to the appropriate authority reasonable notice of any such claim or demand and no settlement or compromise thereof shall be made without the agreement of the appropriate authority.

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Source: https://www.legislation.gov.uk/ukpga/1987/53/schedule/7/part/VII/paragraph/5 (the official version)
Page: https://openlegislation.uk/channel-tunnel-act-1987/schedule-7/part-VII/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.