"Where, at any time after the end of the period for compliance with an enforcement notice, any step required by the notice to be taken has not been taken or any activity required by the notice to cease is being carried on, the person who is then the owner of the land is in breach of the notice."
"In proceedings against any person for an offence under sub-section (2), it shall be a defence for him to show that he did everything he could be expected to do to secure compliance with the notice."
"The factual situation in the present case is ... that the mistake as to the date was upon all sides conceded to be of no materiality whatsoever. It was a clerical error which escaped notice until this matter went to the Crown Court on appeal. It did not affect the resolution of any of the issues. It presented no injustice to this applicant. Accordingly, if it had been noticed and dealt with by the justices it would have warranted them saying that they had no need to amend the information. They could, using the power given to them by section 123, have proceeded with the information as it stood. Likewise, the Crown Court may proceed, in circumstances such as this, using the same power. On appeal they have the same power as the justices and no more."