I'm clipping a frame and posting to Simon at Ilford tomorrow. In regards to moisture, cold storage etc, the details with this film are that I bought it from B&H and it hasn't been in the fridge before or after exposure. It was exposed in a wooden pinhole camera over about 5 days and some of those days had extremely heavy rain in Sydney. The camera never got wet but the humidity would have been pretty high. I processed the film within a day or so of finishing the roll. Didn't notice the spots for a couple of days and by then the backing paper had gone in the rubbish so I had no chance to inspect that. I appreciate Simon's assistance with this and will wait to hear something in due course.