Britain's Grid Operator Under Scrutiny for Underestimating Air Con Demand

• Neso is under scrutiny for underestimating air conditioning demand during a June heatwave.
• The system's frequency fell below operational limits on one day in June.
• Independent investigators found 'cultural issues' at Neso after staff accused executives of covering up blackout risks.
• Control room staff accused senior executives of concealing the extent of blackout risks during the heatwave.
• An external legal firm was tasked with investigating the claims.