Lauren, When informing your new employer of where they can get a reference from Tesco (or any other employer) it is customary to give either the branch address where you worked or the head office address (see your contract for this). Most employers will right to the head of HR or any specifically named person at either address and are accustomed to chasing this information. To make it easier for any new employer to obtain a reference if you can supply a HR phone number or email address this makes gaining reference’s much easier. I hope this makes sense and helps, Good luck with your new job. Craig.