Re speculation on Harry's parentage, I think it's the spencer red hair that always puts people off.
If you lined up TQ's children - none of them look alike. Could be a random group of strangers asjedcto stand together for a photo. Then you line up the next generation of cousins and none of them look like their siblings or each other. Yet Charlette looks like Sarah Gatto, Pippa and a bit of TQ; Beatrice looks like Queen Victoria; Louise sort of looks like TQ, Zara and Anne have the greek of their father. And Frederick Windsor has the look of Beatrice eyes and a young Edward VII. And Charles! Google Princess Mary his aunt scarey how alike they are. So genetics are weird.