Yes, Rose, Martha, Jack and Sarah Jane were time travellers which should have enabled them to remember but because the event was significant in their lives, they forgot

It has never been conclusively stated as such, and none of those characters mentioned have been on the show and in a position to mention it since it was revealed the Dalek invasion was erased, but based on the evidence we can assume that's what happened.

Also note that Ianto was killed in Children of Earth: Day Four, so he won't remember the Dalek invasion.

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