A Middlesbrough sandwich firm, On A Roll Sandwich Company, is to invest £3.6m in a new factory – almost tripling its production space.

The opening will create up to 100 jobs, as it works on a new 35,000sq ft factory at its Riverside Park site.

The firm produces sandwiches, salads and lunch options, which its supplies to schools and universities, national retailers, sports venues and foodservice outlets.

The expansion has cost around £3.2m, after a £640k funding grant from the Tees Valley Business Growth Investment Scheme to assist with the work.

The firm opened in November 2007, and now produces around seven million sandwiches each year – compared to just 665k in its first year.

The factory houses three production lines currently.

James Stoddart who set up the firm with his wife Helen, said: "We are delighted with the way the business has grown since we set it up back in 2008, and we are thrilled that we have been able to secure this grant to help us with our expansion plan.

"This is an exciting time for us, and we thank Middlesbrough Council’s Economic Development team for its assistance with our plan and look forward to growing our relationship with them in the future."

The expansion is hoped to be completed by August this year.