Apparently it is possible to close badger setts down in certain circumstances - without harming the badgers. I listened to a short talk last week and this course of action is sometimes taken if a sett is on land due to be developed. A sort of gate is fixed over the entrances so the badgers can get out but not back in again. It is never undertaken during the breeding period.
http://www.naturalengland.org.uk/ourwork/regulation/wildlife/species/badgers.aspx
My inclination is to let EKLB be, do we really need to know everything about everything?