The agreement required the Solihull-based business to supply a range of print services including direct mail, display graphics as well as storage and distribution facilities.

In addition, Etrinsic's US parent company InnerWorkings will handle a similar contract for the National Grid's American operations.

Matt Bird, managing director at Etrinsic, said: "The key factors in securing this important new client were the levels of visibility, service and value we are able to offer to National Grid through the intelligent leveraging of our organisation’s combined capabilities within both the UK and US marketplaces."

Donna Hicks, senior category manager of National Grid, added that Etrinsic demonstrated "print management capability to meet National Grid’s needs".

Late last year, Etrinsic was awarded a £2m print management contract to supply the Midlands Co-operative Society.

The two-year deal with Midlands Co-op involved supplying all of its marketing and operational print, direct mail and point of sale materials.