Paragraph 4 I1

The undertaker must not obstruct or in any way interfere with the existing access (including all emergency access routes) to the airport, other than in accordance with the carrying out of the authorised development, without the prior consent of the airport operator such consent not to be unreasonably withheld or delayed. Any existing access route which is to be diverted as part of the authorised development must not be closed until the replacement route is constructed and available for use.