Over 6.7 million records from the England and Wales 1920 Electoral Register have been indexed by subscription website Findmypast. This has been undertaken in partnership with the British Library. This work complements the 1939 Register which consists of over 1,200,000 pages listing the names, addresses, marital statuses, occupations and more of over 41,000,000 people.
https://www.bl.uk/collection-guides/uk-electoral-registers