In reply to SouthernSteve:
I suppose it depends a bit on the individual, but conditions have to be pretty extreme for me to put waterproofs on during a race, if I do, worrying about noise or for hat matter breathability isn’t really a consideration. A windproof smock is the best bit of kit you can buy for fell running. I do have some expensive innov8 waterproofs, but I don’t think they offer a great deal over the cheapo Decathlon models for racing.