  Aim: This research proposes the first solely sociodemographic measure of
digital accessibility for Great Britain. Digital inaccessibility affects circa
10 million people who are unable to access or make full use of the internet,
particularly impacting the disadvantaged in society. Method: A geodemographic
classification is developed, analysing literature-guided sociodemographic
variables at the district level. Analysis: Resultant clusters are analysed
against their sociodemographic variables and spatial extent. Findings suggest
three at-risk clusters exist, "Metropolitan Minority Struggle", "Indian
Metropolitan Living" and "Pakistani-Bangladeshi Inequality". These are
validated through nationwide Ofcom telecommunications performance data and
specific case studies using Office for National Statistics internet usage data.
Conclusion: Using solely contemporary and open-source sociodemographic
variables, this paper enhances previous digital accessibility research. The
identification of digitally inaccessible areas allows focussed local and
national government resource and policy targeting, particularly important as a
key data source and methodology post-2021, following the expected final
nationwide census.
