The contract, which was announced this week following a six-month review of the mobile communications retailer’s marketing and print services supply chain, succeeds a four-year deal signed in 2003.

It includes the provision of marketing print services to the retailer’s 2,000-plus European stores, currently valued at £15m per year, as well as an extension to print management services in the UK, including logistics and stationery, and services provided to the firm’s recently launched US branches.

HH managing director Robert MacMillan said: “The £15m figure is based on current spend, but we expect it to grow significantly as the contract provides the opportunity to look at the total group spend.”

Sources estimate that The Carphone Warehouse’s annual print spend could be up to £35m per year, potentially adding £175m to HH’s turnover. This would be a substantial increase on the previous deal, which was worth just £40m over four years.

MacMillan said he was delighted to be continuing HH’s partnership with The Carphone Warehouse, which stretches back almost a decade. He said: “This is a third-generation contract and to sign-up for another long-term deal like this shows that what we are offering is sustainable.”

MacMillan added that HH would deliver further savings to The Carphone Warehouse, “driven out of new opportunities in the group and the increased volumes of work we expect to produce”.