Badger setts are often found in woodland, woodland edges and alongside railway embankments and road verges. The Protection of Badgers Act 1992 makes it illegal to kill, injure or take a badger, or to interfere with a sett. The protection of the sett extends some distance past what may be seen on the surface and construction work may need to be altered to reduce the impact on the badgers in the sett. Badgers are creatures of habit and forage and roam along regularly used paths. These might also cross a proposed development site so that provisions might also be required to accommodate or temporarily exclude badgers there. This might also require a licence.
There is more information on Badgers on the NRW website and you will also find information about here about licensing for works that may affect badgers or their setts.