As I alluded to in another comment, I distinctly remember seeing a web page on the BBC website explaining that this is a cost/resources issue. Apparently the ca

As I alluded to in another comment, I distinctly remember seeing a web page on the BBC website explaining that this is a cost/resources issue. Apparently the capability to display an advert-free version used to be there, but it proved too costly to maintain. I've been trying to find that page, but unfortunately with no success.