"(1) Where there has been a breach of planning control consisting in the carrying out without planning permission of building, engineering, mining or other operations in, on, over or under land, no enforcement action may be taken after the end of the period of four ends beginning with the date on which the operations were substantially completed."
"5.
" . . . it makes better sense of the legislation as a whole to adopt the holistic approach which my noble and learned friend [Lord Hobhouse] has described. What this means, in short, is that regard should be had to the totality of the operations which the person originally contemplated and intended to carry out. That will be an easy task if the developer has applied for and obtained planning permission. It will be less easy where, as here, planning permission was not applied for at all. In such a case evidence as to what was intended may have to be gathered from various sources, having regard especially to the building's physical features and its design. "
"I take the view that this [that is substantial completion] did not take place until the cladding was added to create the present external appearance of the structure, if that is what it is."