Field Operator applicants have rated the interview process at National Grid with 4 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 62.5% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
I interviewed at National Grid (Plymouth, England)
Interview
Semi formal interview
Small panel interview by two people
Challenging questions about the company and their goals
Around a 45 minute long interview
Some challenging technical questions about the roles applied for