BEIJING, April 27 (Reuters) - London aluminium prices recovered from early losses to trade higher for a third day on Friday, as investors bet that U.S. sanctions would remain in place on Russian producer Rusal, keeping supply tight. The metal has lost about 7.5 percent so far this week, having fallen sharply on Monday and Tuesday after the United States gave American customers of Rusal more time to comply with the sanctions, first announced on April 6. This has left aluminium on course for its biggest weekly drop since August 2011, although it is still up 13.9 percent in April on the back of Rusal concerns, which would be its best month since September 2010. "Heightened concerns about long-term supply disruptions due to ongoing U.S. sanctions" have taken aluminium prices back up again, ANZ wrote in a note. FUNDAMENTALS * LME ALUMINUM: Three-month aluminium on the London Metal Exchange climbed 0.3 percent to $2,281 a tonne by 0432 GMT, having fallen by as much as 0.5 percent in early trade. It closed up 1.3 percent on Thursday. * SHFE ALUMINIUM: The most-traded June aluminium contract on the Shanghai Futures Exchange was up 0.5 percent to 14,480 yuan ($2,285.68) a tonne by the mid-session interval. It is down 3.7 percent this week but up 4.8 percent for the month. * RUSAL: Rusal's head of sales Steve Hodgson is leaving the company, a source familiar with the matter said on Thursday. * COLUMN: U.S. sanctions on Rusal shatter aluminium's supply chain: Andy Home. * COPPER: Copper was trading down 0.4 percent at $6,939 a tonne on a firm dollar, which makes metals expensive for holders of other currencies. Shanghai copper was down 0.3 percent to 51,560 yuan a tonne. * COPPER: Chile's Escondida, the world's largest copper mine, said on Thursday that early contract talks with its workers' union ended without an agreement, setting the stage for legally scheduled negotiations to begin in June. * HOLIDAY: The Shanghai Futures Exchange (ShFE) will be closed on Monday and Tuesday for the Labour Day holiday.