This pair were only introduced to the new Enclosure in March. They have proved to be the busier of the 2 pairs that went in. They are currently constructing 2 dams and have been excavating a couple of burrows.
These trail cam clips show the burrow they seem to be using the most. They take food (small branches/twigs) in and throw out what's left.
Now the daylight hours are getting longer they can be seen at dawn and dusk.
Simon Hurwitz