The IHR library holds copies of most University of London theses in history, from the early twentieth century to 2009. From 2009 a decision was made to decentralise theses holdings at the University of London, and copies now go directly to the relevant college library. The IHR now only receives copies of its own PhD students' theses. The pre-2009 copies formerly held by Senate House Library were offered back to the college libraries, and the IHR still holds most of the second copies.
We don't loan or copy theses, and most UK PhD theses are now only available through the British Library’s EThOS (Electronic Theses Online) service. These can usually be digitised on demand if they are not already available, and some universities subsidise the costs. A list of participating institutions is available at http://ethos.bl.uk/HEIList.do. Oxford and Cambridge aren't participating, so enquiries for their theses should be made directly to the institutions. MPhil/MA theses are not covered by EThOS, so enquiries should be made directly to the relevant university. University of London MPhil/MA and non-college PhD theses may be available on inter-library loan or document supply from Senate House Library.
The IHR publishes a list of history theses annually in print format and online on History Online. We do not hold copies of these theses, except where they fall into the collection described above. Enquiries for accessing copies can be made via EThOS or the relevant institution.