RIO

"The miners gave a much-needed boost to the London market with some useful gains. Leading the way was Rio Tinto, up 221p at 4700p, amid mounting speculation that BHP Billiton, up 29p at 1378p, is ready to raise the terms of its bid, which would create £150bn giant. Word is, BHP is ready to lift its all-share offer from three-for-one to 3.6-for-one."

http://www.thisismoney.co.uk/investing-and-markets/tips-and-tactics/article.html?in_article_id=429495&in_page_id=23&ct=5