I'm starting to elaborate my research master's project on the british policy of combating the slave trade, how it evolved during the course of the XIX century, and what impact, if any it has had on british colonial policies.
I believe i have good sources from the places i am focusing on: Brazil, Benin and Nigeria, but from where i live it is very hard to find even recommendations on books about foregin police of the british empire. I am familiar with Robin Blackburn, Thornton, Dreschler, Costa e Silva. any other readings i could be appointed to?
To be honest there's really not much available. My undergraduate dissertation focused on Castlereagh and the slave trade, so I can only help with the 1814-1822 period. Currently writing that dissertation actually, otherwise I'd spend more time formatting. There's more but it's generally just biographies of Castlereagh and studies of the Congress of Vienna itself. The rest is various primary sources (Castlereagh Papers, Wellington Dispatches, British Foreign State Papers etc)
but check out Kielstra's The Politics of Slave Trade Suppression in Britain and France - free chapter here
You might want to look at C.K. Webster's Foreign Policy of Castlereagh Vol2, it's pretty old (1920s) but is good for historiography and a general overview
Richard Huzzey's The Moral Geography of British Anti-Slavery Responsibilities (Article)
Martha Putney - The Slave Trade in French Diplomacy (Article). This focuses on British-French diplomacy for slave trade abolition.
Jerome Reich - The Slave Trade at the Congress of Vienna - A Study in English Public Opinion (Article). This is about how public opinion affected British foreign policy.
Public Opinion and Parliament in the Abolition of the Slave Trade in The British Slave Trade: Abolition, Parliament, and People (Essay in Book)
Judicial Diplomacy: British Officials and the Mixed Commission Courts in Slavery, Diplomacy, and Empire: Britain and the Suppression of the Slave Trade, 1807–1975 (Essay in Book)
Drescher: Whose Abolition? Popular Pressure and the Ending of the British Slave Trade (Article)
Betty Flatland - Abolitionist Pressures on the Concert of Europe (Article)
Jenny Martinez - Antislavery Courts and the Dawn of International Human Rights Law (Article)
Kern - Strategies of Legal Change: Great Britain, International Law, and the Abolition of the Transatlantic Slave Trade (Article)
Eugene Kontorovich - The Constitutionality of International Courts: The Forgotten Precedent of Slave-Trade Tribunals (Article)
Patrick Harries - Negotiating Abolition: Cape Town and the Trans-Atlantic Slave Trade (Article)
Leslie Bethell - The Mixed Commissions for the Suppression of the Transatlantic Slave Trade in the Nineteenth Century (Article)
Edward Keene - A Case Study of the Construction of International Hierarchy: British Treaty-Making against the Slave Trade in the Early Nineteenth Century (Article)