Britain's FTSE 100 index is seen opening 36 points higher at 7,662 on Wednesday, according to financial bookmakers. * BHP BILLITON: Global miner BHP Billiton Ltd posted record iron ore output for fiscal 2018 on Wednesday as fourth-quarter production topped expectations and set a slightly higher target for the current year. * RIO TINTO: Guinea is in constant talks with Rio Tinto and Chinalco to finalise a deal on the Simandou iron ore project, its mining min