The BRA issued free guidelines and memoranda on the rescue and care of records from the 1930s. Three guidelines on the interpretation of deeds are available as pdfs, but others on the care of records have been archived:

3 Interpreting Deeds: A Simple Guide And Glossary
5 Preserving Pre-registration Title Deeds
7 Finding Pre-registration Deeds

Please email (tel.  07946 624713) for further details.

Archived guidelines have been superseded by updated advice available elsewhere.

Glossary of Archival Terms

The Care of Records: Notes for Owners or Custodians (first published 1965)

Depositing Title Deeds: Help Preserve Our Archival Heritage
Sale of Pre-registration Deeds by Solicitors and Others