For the second time in two weeks, the UK’s National Energy System Operator on Tuesday warned that Britain faces a reduced system margin, with a system margin shortfall of about 1.88 gigawatts (GW) later today. NESO has issued an Electricity Margin Notice for the afternoon and evening’s peak period between 3 p.m. and 11 p.m. on Tuesday. “This is a routine and precautionary operational tool, there is no risk to customer electricity supplies and Great Britain’s electricity system remains secure,” the operator…