If you are interested in purchasing historical Land Registry documents, here's where you can find them:
At Nimbus, we supply the very latest HM Land Registry documents.
If you would like to see historical Title Plans or Registers you would need to contact the Land Registry or your local office directly.
You can do this via the government website, on this link: https://www.gov.uk/guidance/hm-land-registry-portal-request-historical-copies