Royal expert's claims about Queen's mystery illness before her death

Lady Colin Campbell claims the Queen had bone cancer in the lead-up to her death.

Video transcript

COLIN CAMPBELL: We should be very grateful for having had such a wonderful monarch. And I think we can also be grateful for the fact that her death was relatively painless. Bone cancer is not fun, but she was fortunate enough to have the lesser of the forms of bone cancer.

And she kept her spirits and her vitality we could see to practically the end.