A huge THANK YOU to everyone who responded and added their thoughts to this one. Just developed 2 rolls of Ilford Pan F 35mm rated at ISO 50 and for the first time developed in Rodinal diluted at 1+50. Looking at the negatives on a light box and with a lube, the negatives look beautiful so I can't wait to get up to where I hire darkroom facilities to get some prints as film scanning just won't do then justice :-). Kind regards Tony