A little helper at the allotment

Three weekends away is a long time at the allotment so there was lots to do. Digging over the potato bed I had this little guy helping me out. He and his mate (not sure which was which!) sang to me while I did the digging in return for some freshly dug up grubs. There was lots of flying back and forth to my shed so I think they might be nesting in there.