A collection from the National Archives of the United Arab Emirates and National Archives UK which has text and images on the political, social and cultural history of the region. It includes some online exhibitions. One is on the discovery of oil.
While many materials are offered in Arabic it does have UK government materials on foreign relations and policy. For instance browse the section on disputes. It is possible to search or browse by subject, place, date.
Also recently made available is the Quatar Digital Library which also has collections on international relations and oil.