The National Archives was formed when the Public Record Office and the Historical Manuscripts Commission combined in April 2003
Elizabeth I, 2003 t.p. (The National Archives) t.p. verso (formed when the Public Record Office and Historical Manuscripts Commission combined in Apr. 2003)
Wills and other probate records, 2004 t.p. verso (The National Archives (TNA))
Making sense of the census revisited, c2005 t.p. (The National Archives of the UK) p. 4 of cover (The National Archives)