I'm pretty sure her name would have "leaked" in the press somehow, as it's such a huge amount.
I agree with Postdog, I would definitely share with my loved ones. Who needs THAT much money?? You can live in luxury on the interest alone, I would imagine! One can dream eh...lol
As I thought, having just checked on the website, publicity is down to you alone.
(H) Release of Information About Winners
Save for the purposes of publicising unclaimed Prizes or as is required by law, the Company may not publicise any details of any Prize winner without the prior written consent of that person.