Hi ethandron !
Here is a link to RSPB South Stack Holyhead, and it has a live WebCam of one of the Chough's on it's nest as well.
The site is up and running properly now after a lot of work over the winter, new Staff recruited as well so you should have a good Breakfast in the restaurant !
The Birds will be there in their thousands i.e Puffins, Guillemots, Razorbills etc along with ravens and Chough's as the breeding Season will be in full swing.
I haven't been for several Years but if my Birding partner (RW ) was around I would take her there to see the spectacle.
Enjoy your day and report back with your sightings !!
http://www.rspb.org.u...ackcliffs/webcam.aspx