The article is devoted to the research of theory and practice of application of international law customs in England law system. It has been studied the usage of the incorporation and transformation doctrines in the English courts practice on the examples of the main cases, dealt with establishment, interpretation and application of international law customs: Buvot v. Barbuit (1737), Triquet v. Bath (1764), Queen v. Keyn (1876), West Rand Central Gold Mining Co., Limited v. R. (1905), Chung Chi Cheung v. The King (1939), Trendtex Trading Corp. v. Central Bank of Nigeria (1977), Maclaine Watson v. Departmant of Trade and Industry (1988) and R. v. Jones and Milling (2006).

В статье проводится исследование истории теории и практики применения международно-правовых обычаев во внутреннем праве Англии. Изучено использование доктрин инкорпорации и трансформации в практике судов Англии на примерах основных дел, связанных с установлением, толкованием и применением международно-правовых обычаев: Buvot v. Barbuit(1737 г.), Triquet v. Bath (1764 г.), Queen v. Keyn (1876 г.), West Rand Central Gold Mining Co., Limited v. R. (1905 г.), Chung Chi Cheung v. The King (1939 г.), Trendtex Trading Corp. v. Central Bank of Nigeria (1977 г.), Maclaine Watson v. Departmant of Trade and Industry (1988 г.) и R. v. Jones and Milling (2006 г.).