You should keep old copies of the full register and the overseas lists for a long as practicable either digitally or in hard copy.
Retaining historical register may assist you when you are processing overseas elector applications if checking the applicant's previous registration.
You should not, however, allow access to a register or other documents other than the current versions.
Local authority libraries and archives services, the British Library and the National Library of Scotland and the Statistics Board holding copies of the full register (and the other associated information) may allow inspection and supply of older versions.1
You could therefore refer inquiries for older versions to any of these bodies.
1. Regulations 96(5), 98(6) and 108A(9) Representation of the People (Scotland) Regulations 2001 ↩ Back to content at footnote 1