German Chancellor Angela Merkel challenged Britain to come up with alternatives to the Irish border backstop within 30 days, but French President Emmanuel Macron cautioned there would be no renegotiation of the Brexit deal.

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The UK’s emergency petroleum stocks will more than halve in the event of a no-deal exit from the EU, reducing the buffer of strategic reserves available in the event of severe global supply disruption.

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National Grid plans to stabilise the energy grid by plugging into new technology after raising concerns a year ago that it may be “walking blind” into the risk of blackouts.