By Kate Abnett BRUSSELS (Reuters) -A “serious disruption” to the European Union’s gas supplies from Russia is likely, the bloc’s energy chief said on Monday as she urged countries to update their contingency plans for supply shocks and use other fuels where possible to conserve gas. “Since the beginning of Russia’s invasion of Ukraine we have known that a very serious disruption is possible, and now it seems likely,” EU energy commissioner Kadri Simson said after a meeting of energy ministers. “We have done much important work to be prepared for this. But now is the time to step it up,” she sa…