In reply to Southampton Tom:
Here's 1300 feet or so of climb:
Hope on Idwal slabs, then Lazarus or Javelin Gully on the Holly Tree wall above the slabs, then Groove Above or The Arete on the continuation wall. If you've still got time, scramble over to the upper cliff of Glyder Fawr and knock off Central Arete at Vdiff, or Grey Slab - an absolute corking VS.
Big mountain day out, cracking scenery.