National Grid plc today announces that it has agreed to acquire PPL WPD Investments Limited, the holding company of Western Power Distribution, the UK's largest electricity distribution business, from PPL WPD Limited, a subsidiary of PPL Corporation for an equity value of £7.8 billion and National Grid has agreed to sell The Narragansett Electric Company (“NECO”) to PPL Energy Holdings, LLC, also a subsidiary of PPL, for an equity value of US$3.8 billion (£2.7 billion)….