This hole in a sandy bank was originally dug by badgers as part of a sett.
In 2010 it was taken over by foxes, which used it to raise cubs.
Now there are signs that more work is being done on it – fresh sand on the pile downslope of the hole. Could be foxes, or perhaps the badgers have reclaimed it.
Notice the plastic wrapping being dragged into the hole: perhaps for use as bedding material.