Convention on Social Security Between the United Kingdom of Great Britain and Northern Ireland and Spain (with Protocol on Health Care); London, 13 September 1974 ..

Exchange of Notes Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of Spain Concerning the Reciprocal Granting of Licences to Amateur Radio Operators

Exchange of Notes Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of Spain Concerning the Safeguards and Assurances Relating to the Transfer of Nuclear Material from the United Kingdom to Spain

Agreement Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Spanish State on the International Carriage of Goods by Road; London, 26 April 1972