In reply to phil456:
For routes around F4 in addition to Cheyne Wears you should check out The Bower (below the Cuttings), Dungecroft Quarry (adjacent to Cheyne Wears), The Veranda (Battleship area) and Fallen Slab/triple slabs/diamond slab/lunar park (all below Blacknor South) also the Battleship Block.
Some of these areas have been relatively recently bolted, so you will only find them in the 2012 Rockfax, definitely the best current guide and pretty comprehensive with regard to bolted climbing on the island.