Within two years, there were fifty Earth First groups and activists linked with other parties in the road protest movement. There were large camps at Twyford Down and the M11 link road protest.
The passage describes a significant increase in the number of individuals and groups participating in the road protest movement over a two-year period. This involved the formation of Earth First groups, their connection with other parties, and the establishment of large camps at key locations like Twyford Down and the M11 link road protest site.