"After a few days out of the spotlight, the mining sector was back in focus as several strange takeover rumours flew round the City late in the day. Shortly before the market closed, Xstrata shot up amid speculation that Anglo American was preparing a £50-a-share knockout bid."
http://www.telegraph.co.uk/money/main.jhtml?xml=/money/2008/02/28/cxmktrep128.xml