Well I've done ten out of my head that I'm fairly confident of, and sent off to Walrus.
    Q6, the two seas riddle is intriguing. I've been thinking hard. Given it's a riddle, I presume we can ignore the possibility of two actual seas. So I guess it comes down to two things pronounced, but not spelt "sea", or alternatively a river beginning and ending with the letter c. And I cant think of one of them either. I'm not computer literate: can you type in something like "river c......c" and get a search to find anything that matches?