Search over the 500k UK theses from over 120 UK institutions: the Electronic Theses Online Service (EThOS), operated by the British Library, is the centralized national repository for UK doctoral theses. It aggregates metadata for over 600,000 PhD records from more than 140 higher education institutions, providing a single point of discovery for research dating back to the 1700s.
Update from the editor: EThOS was badly damaged by the cyber-attack. Work is underway to restore an interim platform in early 2026. There is no need to update existing links to EThOS records as they will resolve to the relevant thesis on the new platform. We will continue to update the database regularly, although there will be an initial backlog of content to work through.
All theses in EThOS prior to October 2023 are in the British Library catalogue. You can filter your search in the catalogue by using the ‘Advanced search’ and filtering ‘Material type’ to ‘Theses’. This will show you the name of the awarding university. You can then search the university’s institutional repository or library catalogue for the thesis.
A digital copy of a thesis is likely to be downloadable in the awarding university’s institutional repository. A directory of university repositories is available at OpenDOAR. Please note, not all doctoral theses are available digitally and you may need to visit the university to view a print copy.
View more information on how to search the British Library catalogue.
You can also download a CSV file of the metadata of all theses held in EThOS prior to October 2023 from the British Library’s Research Repository.
50% are available online as full text.
Professionals in science, engineering, and innovation utilize EThOS to retrieve deep-tier technical data and experimental results that are often excluded from condensed commercial publications. The platform is specifically applied for:
- Conducting exhaustive prior art searches to validate the novelty of inventions during the patenting process.
- Reviewing specialized engineering methodologies and material performance data documented in niche doctoral studies.
- Benchmarking industrial R&D against established academic findings to optimize resource allocation and avoid redundant testing.
- Identifying emerging scientific breakthroughs and theoretical frameworks before they transition into mainstream industry applications.
