Where consent for the display of advertisements is revoked or modified by an order made under regulation 22 then if, on a claim made to the planning authority in writing and served on that authority by delivering it at, or by sending it by prepaid post to, their offices within 6 months after confirmation of the order, it is shown that any person has incurred expenditure in carrying out, in connection with the display in question, work which is rendered abortive by the revocation or modification, or has otherwise sustained loss or damage which is directly attributable to the revocation or modification, that authority shall pay to that person compensation in respect of that expenditure, loss or damage:

Provided that no compensation shall be payable under the paragraph in respect of loss or damage consisting of the depreciation in value of any interest in the land by virtue of the revocation or modification.

For the purposes of this regulation, any expenditure incurred in the preparation of plans for the purpose of any work or upon other similar matters preparatory to the work shall be deemed to be included in the expenditure incurred in carrying out that work, but except as aforesaid no compensation shall be paid under this regulation in respect of any work carried out before the grant of the consent which is revoked or modified, or in respect of any other loss or damage arising out of anything done or omitted to be done before the grant of that consent.