METALS-London copper rises on lower inventories, aluminium slips

(Adds analyst comment, updates prices) BEIJING, May 10 (Reuters) - London copper prices rose for a second session on Thursday on falling inventories and strong import numbers from top consumer China continued, while aluminium retreated for the first time in four trading days. China imported 442,000 tonnes of unwrought copper in April, according to customs data released this week, the highest monthly total so far in 2018. "Apart from the reduced supply of copper scrap, the strong imp