The Marquess of Londonderry: Aristocracy, Power and Politics in Britain and Ireland (London: I.B. Tauris, 2005).
The Longman Handbook of Modern Irish History since 1800 (London: Pearson, 2005) (with Alan ODay).
Ireland and Anglo-Irish Relations since 1800: Critical Essays (3 vols, Aldershot: Ashgate, 2008) (with Alan ODay).
Charles Stewart Parnell and His Times: A Bibliography (Santa Barbara, CA, 2011) (with Alan O'Day).
Britannias Zealots, Volume I:Tradition, Empire and the Forging of the Conservative Right (London: Bloomsbury Academic, 2018).
'The first government of Northern Ireland, education reform, and the failure of anti-populist unionism', 1921-1925, Twentieth Century British History, 18:2 (2007): 146-69.
'The press, empire and historical time: the Times and Indian self-government, c.1911-1947', Media History, 16:2 (2010): 1911-1947
'Echoes of Britannia: television history, empire and the critical public sphere', Contemporary British History, 25:1 (2010): 1-22
"Incorrigibly plural: new histories of Ulster and Northern Ireland", Twentieth Century British History, 21:1 (2010): 11017.
'Cabinet government, British imperial security, and the World Disarmament Conference, 19321934' War in History, 18:1 (2011): 6284.
'Diehard Conservatism, mass democracy, and Indian constitutional reform, c. 1918-1935', Parliamentary History, 32:2 (2013): 337-60
'Political extremes and extremist politics', Political Studies Review, 12:3 (2014): 395401
'Diehard Conservatives and the Appeasement of Nazi Germany', 19351940, History: The Journal of the Historical Association, 100:341 (2015): 412-435.
'The Imperial Maritime League: British Navalism, Conflict and the Radical Right', c. 19071920, War in History, 23.3 (2016): 296-322.
'Conquest, Empire and the Struggle for Supremacy', War in History, 23:2 (2016): 251-256.
'Lancashire Conservatives, Tariff Reform, and Indian Responsible Government', Contemporary British History, 30:2 (2016): 151-176.
'Women and Lancashire Conservatism between the Wars', Women's History Review, 26:3 (2017): 329-349.
'Lord Londonderry and Ulster politics', 19216, in Joost Augusteijn, Mary Ann Lyons and Deirdre McMahon (eds), Irish History: A Research Yearbook, 2 (Dublin: Four Courts Press, 2003): 7280.
'Old and new Unionism: The seventh Marquess of Londonderry', 19051921, in D.George Boyce and Alan ODay (eds), Ireland in Transition, 18671921 (London: Routledge, 2004): 22340.
'Landlords, power and loyalism in late-Victorian Ulster', in Christine Kinealy and Roger Swift (eds), Politics and Power in Victorian Ireland (Dublin: Four Courts Press, 2006): 14354.
'The landed elite, power, and Ulster Unionism', in D. George Boyce and Alan ODay (eds), The Ulster Crisis, 18851921 (Basingstoke: Palgrave, 2006): 86104.
'Aristocratic appeasement: Lord Londonderry, Nazi Germany, and the promotion of Anglo-German misunderstanding', Cardiff Historical Papers, 4 (Cardiff: Cardiff University, 2007): 136.
'Leadership, the middle-classes and Ulster unionism since the late nineteenth century', in Fintan Lane (ed.), Politics, Society and the Middle Class in Modern Ireland (Basingstoke: Palgrave, 2009): 21229.
'Gladstone and the Ulster Question', in D. George Boyce and Alan ODay (eds), Gladstone and Ireland: Politics, Religion and Nationality in the Victorian Age (Basingstoke: Palgrave, 2010): 14061.
(with Alan ODay) 'Accommodation, conciliation and cooperation: a Gladstonian legacy', in D. George Boyce and Alan ODay (eds), Gladstone and Ireland: Politics, Religion and Nationality in the Victorian Age (Basingstoke: Palgrave, 2010): 23355.
'Education since the late eighteenth century', in Liam Kennedy and Phillip Ollerenshaw (eds), Ulster since 1600: Politics, Economy, and Society (Oxford: Oxford University Press, 2013): 211-227.
'Lord Londonderry and education reform in 1920s Northern Ireland', History Ireland, 9.1 (Spring, 2001): 3639.
New Ireland, same old heroes, Fortnight, 405 (June 2002): 33.
'The Londonderry Herr: Lord Londonderry and the appeasement of Nazi Germany', History Ireland, 13.1 (Jan./Feb., 2005): 3135.
'Aristocratic rule? Ulster unionism and Northern Ireland', History Ireland, 15.6 (Nov./Dec., 2007): 2631.
'A change of mind? [part 1] Churchill on Ireland', Memo: The Winston Churchill Memorial and Library in the United States, 31 (Summer, 2009): 1012.
'A change of mind? [part 2] Churchill on India', Memo: The Winston Churchill Memorial and Library in the United States, 33 (Winter, 2010): 1013.
'Tory rebels: The inevitability of backbench revolts', History & Policy (31 May 2012).
'Stanley Baldwin, The Times, and Indian self-government', Conservative History Journal, 2:2 (2013): 812.
'Scaremonger or Patriot? Lionel Horton Smith and War with Germany', British Library Untold Lives Blog (1 Sept. 2015).
'Revolting Grassroots: Conservative Prime Ministers and the Party Membership', History Matters (10 Feb. 2016).
'Diehard Conservatives: Southern English or Four Nations?', Four Nations History Network Blog (26 Feb. 2016).
'Sunday Blues: Conservatives, Religion and Party Identity', History & Policy (31 March 2016).
'The Conservative Right, Europe and Anti-Americanism', History & Policy (22 April 2016).
'Brexit, the Commonwealth and the Problem of Imperial Nostalgia', History & Policy (8 July 2016).
'Conservatives, Patriotism and State Intervention: An Edwardian Inheritance', History & Policy (13 Oct. 2016).
'The rise of Women Conservatives in inter-war Lancashire', Conservative History Journal, 2:5 (2017): 12-16.
'Dr Alan O'Day (1940-2017): Historian of Ireland', Perspectives on History: The Magazine of the American Historical Association, 55:9 (2017).
External Examiner, PhD in History, University of Ulster (2018)
External Examiner, BA Hons in History, Bath Spa University (2017-20)
External Examiner, PhD in History, University of Ulster (2017)
External Assessor, REF Preparation Exercise, Department of History, University of Bristol (2017)
Research Officer, History UK (2017-)
Peer Reviewer, Palgrave Macmillan (2012 and 2013)
Executive Committee Member, British International History Group (2012-17)
Executive Committee Member, British Fulbright Scholars Association (2011-14)
Peer Reviewer, Irish Research Council for the Humanities and Social Sciences (2010)
Technical Editor, John Wiley & Sons (2005)
Peer reviewed articles for Twentieth Century British History, Journal of Imperial and Commonwealth History, Irish Historical Studies, Media History,Women's History Review and Parliamentary History