10,107 adults in Great Britain were interviewed online between 14 and 20 January 2020. Data have been weighted to be representative of all adults in Great Britain.
1,073 members of the Labour Party were interviewed online between 10 and 14 January 2020.
Full data tables are available at LordAshcroftPolls.com.
Eighteen focus groups of former Labour voters were held in January 2020 in former Labour constituencies won by the Conservatives in 2019: Bolsover, Bridgend, Burnley, Don Valley, Scunthorpe, Sedgefield, Stoke-on-Trent North, West Bromwich East and Wrexham. Participants had voted Labour in 2017 but stayed at home or voted for other parties in 2019, or had voted Labour in 2015 but for other parties in 2017 and 2019.
Four focus groups of Labour Party members and members of Labour-supporting trade unions were held in London and Birmingham in January 2020.