1023 GMT - National Grid is on track for double-digit earnings growth, BofA analysts write as they retain their buy rating on the stock. The U.K. grid operator's first-half results were supportive and showed sound execution and upgraded capital expenditure guidance that suggests concerns around supply chain bottlenecks may be overdone, they note. The bank expects earnings per share to grow at a compound annual rate of 9.6% to 2030.