it got me searching for the duke of devonshire in court on google and it lead me to a credit referencing agency linked with companies house clicked the link for a-z companies list looked at dv and went down and saw all the dvla agencies through out the country 
just another back up to use for proof 
EDIT: https://secure.creditgate.com/search/search.aspx?AP=N&CompanyID=B2582794&CompanyType=N&BS=1&BT=Basic%20Non-Limited
Available Reports Details
Business Name:
DVLA
Business Status:Basic Non-Limited
Ref No:B2582794
Established:02/10/1999
Address:
Dvlc
Longview Rd
NO POSTTOWN
NO COUNTY
SA99 1DE