“A. the carrying out on agricultural land comprised in an agricultural unit of 5 hectares or more in area of − (a) works for the erection, extension or alteration of a building… which are reasonably necessary for the purposes of agriculture within that unit.”
“... The one-year period is intended to ensure that a right to compensation does not exist in perpetuity simply because a type of development was once permitted development, yet to allow compensation to a person who was in the process of undertaking a development and who may already have incurred expenditure in reliance on the development order permission.”
“The section does not limit the applicant to one single compensation payment. Whilst that may be of necessary implication into the section the point remains unclear and the threat of successive applications in respect of the same development remains.”