If you are a PSGA member or are working as a contractor/sub contractor for one, you can access maps royalty free.
From local authorities, to central government departments, to town and parish councils and from the emergency services to NHS Trusts,
nearly every public sector organisation in England, Wales and Scotland can become a public sector member.
Check to see if you or your contracting company are already a PSGA member:
https://www.ordnancesurvey.co.uk/business-government/partner-member/member
If you now want maps at a heavily reduced price just complete this template
https://www.ordnancesurvey.co.uk/documents/partners-secure/licences/fcp-contractor-licence.pdf
and email it to info@streetwise.net
You will then be given access to all Ordnance Survey mapping for a small monthly fee (depending on the number of products you require).
This pays for supply of the data and contributes to company overheads.
And, by the way, we are happy to beat any written quote you already have by at least 20%.