One V1 that impacted near Oswaldtwistle carried a load of propaganda leaflets. Leaflets from these V1s were also found at Brindle, near Manchester and Huddersfield, Yorkshire.
Evidently a large number of V1s were loaded with propaganda leaflets. This subject is covered in meticulous detail by Herbert A. Friedman in his Web page article
The German V1 Rocket Leaflet Campaign. This fascinating article explains how the leaflets were stored and dispersed and includes an impressive number of V1 related photographic images and numerous actual propaganda leaflet reproductions. It is also a treasure trove of V1 Flying Bomb information.
The British government was pretty secretive about V1 impact sites for they did not want the Germans to know the number of those that reached the target area and exactly where they had fallen.