European Energy Commissioner Guenther Oettinger said he was aiming to arrange further talks to solve the gas pricing row between Moscow and Kiev, which has led Gazprom to reduce supplies to Ukraine.
Kiev failed to meet a deadline this morning to pay off its gas debts in a dispute that could disrupt supplies to the rest of Europe.
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Labour strongholds tended to remain so - apart from a major loss for the party in Dudley.
Labour suffered a "terrible" defeat in Rhondda but has already won 16 Welsh Assembly seats as it looks to record a fifth term in office.
UKIP have made further gains in the local elections in the Anglia region and the Conservatives have won back control in Peterborough.