Shareholder Investigation Announcement: Wolf Haldenstein Adler Freeman & Herz LLP Investigates National Grid plc (NYSE: NGG)
1. Wolf Haldenstein investigates potential securities claims against National Grid plc. 2. Allegations involve misleading business information to shareholders. 3. Heathrow fire was linked to National Grid's failure to maintain infrastructure. 4. UK's Energy minister found the issue 'deeply concerning', acknowledged for seven years. 5. National Grid ADSs fell 5% on news regarding the Heathrow fire.