After ten minutes it few off but was back later in the afternoon. Further along the same path a Woodlark was singing, and fed distantly on the ground for some time:
There were a few Yellow Wagtails around the site:
I spent two hours in the afternoon trying to photograph the speedy Sand Martins on the lake. This wasn't made easier by poor light, and at the wrong time of day when the sun did come out the birds were often in too much shadow:
Must try again with better light!