Complex sentence: The Society reports on the central area buses or'red buses' and country area buses in the previous Green Line area, roughly bounded by Gravesend, Crawley, Guildford, Windsor, Aylesbury, Luton, Harlow and Tilbury.
Split into simpler sentences: The Society reports on the central area buses or'red buses' and country area buses,' the previous Green Line area. The country area is roughly around Gravesend, Crawley, Guildford, Windsor, Aylesbury, Luton, Harlow and Tilbury.