erect any mill dam, weir or other like obstruction to the flow of any ordinary watercourse or raise or otherwise alter any such obstruction; or

erect a culvert in an ordinary watercourse, or

alter a culvert in a manner that would be likely to affect the flow of an ordinary watercourse,

the consent is not to be unreasonably withheld; and

if the board fail within two months after the relevant day to notify the applicant in writing of their determination with respect to the application, they shall be deemed to have consented.

the day on which the application is made; and

if at the time when the application is made an application fee is required to be paid, the day on which the liability to pay that fee is discharged.

to any works under the control of a navigation authority, harbour authority or conservancy authority; or

to any works carried out or maintained under or in pursuance of any Act or any order having the force of an Act.

in relation to a watercourse in an internal drainage district, are references to the drainage board for that district; and

in relation to a watercourse in an area outside an internal drainage district, are references to the lead local flood authority for the area.

in a case where the person by whom the obstruction has been erected or raised or otherwise altered has, at the time when the notice is served, power to remove the obstruction, that person; and

in any other case, any person having power to remove the obstruction.

to a fine not exceeding level 5 on the standard scale; and

if the contravention or failure is continued after conviction, to a further fine not exceeding £40 for every day on which the contravention or failure is so continued.

take such action as may be necessary to remedy the effect of the contravention or failure; and

recover the expenses reasonably incurred by them in doing so from the person in default.

any person having control of the part of the watercourse where any impediment occurs; or

any person owning or occupying land adjoining that part; or

any person to whose act or default the condition of the watercourse mentioned in subsection (1) above is due.

the nature of the works to be carried out and the period within which they are to be carried out; and

the right of appeal to a magistrates’ court and the period within which such an appeal may be brought under section 27 below.

the drainage board F11... concerned may themselves carry out the works and recover from that person the expenses reasonably incurred by them in doing so; and

without prejudice to their right to exercise that power, that person shall be guilty of an offence and liable, on summary conviction, to a fine not exceeding level 4 on the standard scale.

that the notice or requirement is not justified by that section;

that there has been some informality, defect or error in, or in connection with, the notice;

that the body which served the notice has refused unreasonably to approve the carrying out of alternative works, or that the works required by the notice to be carried out are otherwise unreasonable in character or extent, or are unnecessary;

that the period within which the works are to be carried out is not reasonably sufficient for the purpose;

that the notice might lawfully have been served on another person and that it would have been equitable for it to have been so served;

that some other person ought to contribute towards the expenses of carrying out any works required by the notice.

may serve a copy of his notice of appeal on any person having an estate or interest in the part of the watercourse where the impediment occurs or land adjoining that part; and

shall, where the grounds upon which the appeal under this section is brought include a ground specified in subsection (1)(e) or (f) above, serve a copy of his notice of appeal on each other person referred to.

with respect to the person by whom any work is to be carried out and the contribution to be made by any other person towards the cost of the work; or

as to the proportions in which any expenses which may become recoverable by the body which served the notice are to be borne by the appellant and such other person.

as between an owner and an occupier, to the terms and conditions (whether contractual or statutory) of the tenancy and to the nature of the works required; and

in any case, to the degree of benefit to be derived by the different persons concerned.