BUZZ-Mining companies: Up on steady metals prices
** Miners' shares rise in premarket trade as prices of metals bounced up off their earlier lows
** Rio Tinto Plc (LSE: RIO.L - news) 's U.S.-listed shares up 4 pct at $42.64; London-listed shares shares up 2.8 pct
** BHP Billiton Plc (NYSE: BBL - news) 's U.S.-listed shares up 3 pct at $45.26; London-listed shares up 2.7 pct
** Britain's top equity index rises back within reach of record highs as steady metals prices helped mining stocks rebound
** Up to Monday's close, Rio Tinto (Xetra: 855018 - news) 's U.S.-listed stock had fallen 11 pct this year, while BHP's U.S.-listed stock had fallen 7 pct