I have tried the bran method on lettuces, cabbage and dahlias which previously have been decimated by slugs ( and left some without to see if they get hit - and they do) and it does appear to work. Bought a large bag (25KG) from the farm supplies where wifey gets her chicken stuff for around £8. Even with all the stuff I grow and use it on at the lotty I reckon one bag is going to last the season. Will have a much better idea then whether or not it really works.

Let all the grapes know later in the season

Sam