In reply to Blue Straggler:
> look like the enlarger had dust and hair on it, but I doubt that it did (well-maintained minilab in Tesco).
not sure if that was a joke? Tesco are renown for the dust they add to the pictures (and scratches to the negatives) (Im not slating them I still use them, its cheap and my film stuff is just messing about)
The colour casts come from the scanners AWB (Auto White Balance / Always Wrong Balance)