IE 10 for Metro is plugin free, so there it has no Flash Support. It doesn't bother me because Flash has outlived itself and the sooner it's buried the better.
That doesn't help to access a large amount of content on the BBC site, I'm afraid. One of the busiest sites in the world! We live in the present and what happens to Flash in the future is irrelevant.
It's not a 'problem', just a pain swapping back and fore between apps depending on the content of the sites being visited. Awkward and loss of continuity.