LONDON, Oct 6 (Reuters) - Shell (SHEL.L) is focusing its short-term investments on new natural gas infrastructure and boosting supplies to existing liquefied natural gas (LNG) plants, an executive said on Thursday.

"In the short term our focus is on the investment required for infrastructure... and investments to backfill existing LNG plants around the world," Shell's head of LNG Cederic Cremers told the Energy Intelligence Forum in London.

Infrastructure includes LNG regasification terminals and gas pipelines, he said.

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Spain's energy minister said European leaders meeting in Prague on Friday were nearing consensus on an EU gas pricing system that would create an alternative to the current benchmark and effectively cap prices.

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