Apparently there are three eggs this year, though I haven't seen them for myself. The birds have figured out that they're fairly safe if you're behind a window, so it was possible to take a reasonable shot of one on the nest even with my cheap camera.
If you're outside and get too close, oystercatchers are one of those breeds of birds that feign injury and run around to try to draw you away from the nest. The eggs are pretty well camouflaged against the gravel when this occurs. It seems to be a fairly successful defence mechanism.
We never see much of the chicks when they hatch. For a day or two, there are small brown fluffy editions of the parents, running around peeting and lurking in the gravel trying to look like oystercatcher eggs. Then they are gone, both parents and brood, for another year.
Still, they seem to do their job. We did have an infestation of mice recently, but in the six years we've been here, we've yet to suffer the depradations of a horde of ravening oysters.