In reply to Ian Bell:
Navigation is much better than Bargoed - a nicer place and better climbing and rock. It doesn't really seep apart from the odd crack and corner and dries really fast, the left hand side can be a bit wet after rain but i'd be surprised if it wasn't all dry by the weekend. There are a few silly run outs on the easier bits of the sport routes there but on the whole nothing too bad. As already mentioned Fly me to the moon is good, but the ravens were still there at the start of April so could be best to avoid it. On Jupiter and Mars is great, the only route there that it's really worth having half ropes for. (you can just about get away without though) The owl and the antelope and Let me play amongst the stars are both good e2s (although Let me play amongst the stars seemed very soft)
Western Front is the best route there and well worth doing, the crack can seep just above the roof but it's still doable (i didn't find it made much difference anyway) and it will dry whilst you're there if its a sunny day. The other sport routes around that area (Relaxed Ladybird, Great Expectations, Eastern Bloc etc.) are all worthwhile too.
Bargoed is OK, quite a few pleasant routes in the mid 6s but nothing particularly stands out. The right hand side dries reasonably fast (i.e. routes to the right of the arete) and Lyddite is very good at 7a+, but very thin and quite hard to work out past the second bolt.
Have fun!
Tom
Post edited at 01:59