Fintan Slye, head of the new grid operator Neso, is aware that critics are sceptical about achieving ‘clean power by 2030’. But with tough decisions, he says, it can be done

The dense latticework of Great Britain’s electricity grid looms above the control-room floor from giant digital screens that show every pulse of the country’s power system.

From this unassuming office block in the Berkshire countryside, home to National Grid’s control centre, the UK’s shift away from fossil fuels has been monitored for more than 30 years.