FTSE 100 on longest winning streak since October London's main market merrily climbed in its first post-Christmas trading day, boosted by all-time highs across on Wall Street. The blue-chip index enjoyed its sixth day of rises on Friday, its longest winning streak since the middle of October. The FTSE 100 added 56.7 or 0.85pc to 6750.87, its highest level since early November. The FTSE 250 closed up 95 or 0.6 to 15878. Miners, which count for a significant chunk of London listings, received a boost as investor moved into more defensive stocks. Fresnillo jumped to the top of London's big cap leader board, gaining 25.2 - or 3.59pc - to 735p. Antofagasta lifted 25.5 to 830.5p, Anglo American shot up 34 to £13.09 while commodities giant Glencore Xstrata lifted 7.65pc to 315p. Over on the FTSE 250 Kazakhmys claimed the top spot, closing up 19.5 - or 9.79pc - to 218.5p. David Papier, trader at Accendo Markets, said: "Copper rose to its highest level in four months with signs that Asia and the United States are recovering economically, with momentum building in the global economy we could see a further positive outlook in 2014 for metals." Churchill Mining rose 20 - or 3.25 - to close at 20.75p on London's small cap AIM market after it said there will be a tribunal decision in late January or early February on its battle with Indonesian auhorities. The company is suing the Republic of Indonesia for more than $1bn (£606m) after the local government revoked Churchill's coal mining licence. Royal Dutch Shell delivered a late Christmas present for shareholders by saying it would extend its share buyback programme into 2014 after already returning $5bn to investors. The company shares nuged up by 0.5 to £21.63. Drugmaker Astrazeneca fell 7 or 0.19pc to £36.05 after it announced it had settled a dispute with Japan's Shionogi over its cholesterol blockbuster drug Crestor and extend its licence until 2023 from 2016 , but at a lower royalty rate for the next two years. Meanwhile, UK orphan drug giant Shire said it was extending the offer period of its $4.2bn takeover of rare disease drug group ViroPharma until 9 January. Shire said ViroPharma shareholders had already tendered 76pc of shares. Investors were cheered by the certainty of the deal and shares rose by 26 to £28.53. Emerging markets lender Interpersonal Finance was the FTSE 250"s biggest faller after tanking by 83 or 15.3pc. The company hosted a call yesterday on its £2.4m fine from the Polish consumer protection office over the way it calculates rates of interest.