There is no specific law preventing them from doing so (viaMirror Online).

One example occurred when she uncharacteristically spoke out about Brexit in early 2019.

Why would the queen choose to break a lifetime of careful non-commenting at this juncture?

Royal family

Could this be so?

Hmm, this bodes well for a new and very interesting era in royal-watching.

Queen Elizabeth II

Queen Elizabeth II and Meghan Markle