This small (probably about 9mm across?) spider was burrowing into a small hole in open, sandy soil on heathy grassland at Calley Heath Yorkshire Wildlife Trust reserve. It spent some time underground, arranging the granules at the mouth of its burrow, with just the tips of its legs visible. It only emerged when an ant disturbed it from its hole.
Just a genus would be interesting.
Thanks for any help with what it is.
Ian