Here is what you need to know at the London market open: FTSE 100: called up 0.3% at 8,560.41 Hang Seng: up 0.2% at 22,829.96 Nikkei 225: up 1.4% at 37,455.32 S&P/ASX 200: up 0.5% at 8,231.20 DJIA: ...