By Rhodri Morgan London-listed miner Anglo American has said it is considering a “highly conditional” all-stock offer from the world’s largest miner, BHP. In a statement to the London Stock Exchange today, Anglo’s board said it was reviewing a £31.1bn all-share offer for a buy-out by by the world’s largest mining company, preceded by de-mergers by Anglo of its entire shareholdings in its Anglo American Platinum (Amplats) and Kumba Iron Ore businesses, both listed in South Africa. Investors in Anglo American would receive 0.7097 BHP shares for each share they hold, as well as shares in Anglo Am…