A claim under this Part of this Act shall be made by serving on the responsible authority a notice containing particulars of—
Subject to the provisions of this section and of sections 12 and 14 below, no claim shall be made before the expiration of twelve months from the relevant date; and the day next following the expiration of the said twelve months is in this Part of this Act referred to as "the first claim day".
Subsection (2) above shall not preclude the making of a claim in respect of an interest in land before the first claim day if—
but compensation shall not be payable before the first claim day on any claim made by virtue of this subsection.
Where notice of a claim has been served on a responsible authority, any person authorised by that authority may, on giving reasonable notice, enter the land to which the claim relates for the purpose of surveying it and ascertaining its value in connection with the claim; and any person who wilfully obstructs a person in the exercise of the powers conferred by this subsection shall be guilty of an offence and liable on summary conviction to a fine not exceeding level 1 on the standard scale.
Where compensation is payable by a responsible authority on a claim there shall be payable by the authority, in addition to the compensation, any reasonable valuation or legal expenses incurred by the claimant for the purposes of the preparation and prosecution of the claim; but this subsection is without prejudice to the powers of the Upper Tribunal in respect of the costs of and incidental to proceedings in the Upper Tribunal by virtue of section 29 of the Tribunals, Courts and Enforcement Act 2007.