Electricity demand from UK data centers will jump sixfold over the next 10 years as a boom in artificial intelligence requires increased computing power, according to the head of National Grid Plc. That will ramp up pressure on the country’s electricity network, which must move vast quantities of renewable energy from as far away as Scottish wind farms to data centers around London. And it’s a grid already under strain from the accelerating electrification of home heating, transportation and industries.