susieb happy family snaps of naked children don't constitute indecent images and on their own would not raise suspicion. There has to be a context that creates concern.
Thousands of images of children being abused are an entirely different thing. We keep hearing about paedophiles using catalogues or magazines containing photos of children for their own perverse reasons, but this is a myth that has had some slight nugget of truth in it. Usually, the photos that are found and used as evidence of child abuse are extreme and distressing and any that look like normal snaps of children are likely to be children known to the offender.
Janet and John books trigger warning 😳

He was a chanced, not the kind of paedophile who couldn't help himself. Probably not even a paedophile at all in the true sense of the word.