Just to add to this interesting discussion, did anyone else hear the STN ATIS the other day, giving the runway as "dry, damp, wet".
That made us think about what figures to use! It somehow seemed a bit daft but also do you use dry or wet figures? Assuming the point of wet figures is for the engine failure at V1 and stop scenario, then based on the fact that you would be starting to stop on the damp bit then running into the wet bit I reckon that wet figures would be the most prudent.
But as we'd never come across it before, any other input would be welcome.