I was on holiday in Sennen at Easter and 'found' some really beautiful bouldering below the Coastguard face at Sennen. I am sure it has been climbed on many times before but there is little obvious info about it on javu.co.uk or anywhere else.
There are loads of excellent easy to middle grade problems from about 4m to 6m high. I did most of the obvious easier lines and there are some brilliant looking harder problems to do. It is not steep, mainly vertical.
I have posted a picture of the area looking back to it with the main Sennen Coastguard face above and behind:
To reach it just down climb the rocks below the main crag approach path once you start across below the Coastguard face. It is tidal so be careful but when I was there the tide was well below most of it.
Sorry if it is well documented elsewhere but I loved it.
Gwynver is essentially the next beach north of Sennen, within the same bay. There are some good problems there, but you need a spotter and a mat, as landings can be a bit dodgy. There's also some decent stuff on Zennor Hill, which is the hill right behind Zennor. Again, you find your own problems.
Clodgy does have good problems and an excellent topo, courtesy of Barney Carver.