Following Tom's post. I went out to the Burrows this evening, and three things happened.
1. Met a non-birding friend who said they'd been seeing up to 4 Owls here for about 6 weeks. (!)
2. Saw a Short-eared Owl.
3. Met Tom, who had seen 2 Owls before I arrived.
So three Short-eared Owls this evening. Lots of Swallows vapouring about, and a few singing Willow Warblers. Got back to the car just before the rain set in.