For anyone wanting to see the same shockwave as is linked here in video form, a BBC article[0] has a it embedded. The Himawari viewer works well for stills but makes the effect over time a bit harder to appreciate.
The worst one I ever saw was where above the fold items were unchecked, but the below the fold items were checked where you couldn’t see them.
Are you sure that by accepting you aren't just accepting legally to continue to be tracked with all other means?
If true, then deleting cookies only cause them to ask again next time, but you're still fully tracked.
See https://www.kompyte.com/blog/5-ways-to-identify-your-users-w... (just found it) for examples of tracking without cookies.
I guess sending in a letter isn't as good for social media engagement, though.
Could be the BBC's fault, possibly due to in-country legalese though?