The new enclosures also had to be sensitive and appropriate to the setting - a UNESCO World Heritage Site, Scheduled Ancient Monument, and Grade I listed structures.
In fact, scientists already have much of the information needed to assess the impact of biological control of bracken, but it is spread among many individuals, organizations, and government bodies.
A shorter drought in which they exhausted their stored food supplies might already have gotten them in deep trouble, because growing crops required rain rather than reservoirs.
The companies building the canals to transport coal needed surveyors to help them find the coal deposits worth mining as well as to determine the best courses for the canals.