Treaties — Definition of treaty — Undertaking by Member States of European Communities to provide funds for supplementary budget — Whether a treaty — Whether ancillary to existing Community Treaties — Whether inconsistent with Community treaty provisions regarding financing of the Communities — Effect of treaties in municipal law — EEC Treaty, 1957 — United Kingdom Treaty of Accession, 1972 — Effect of the Community Treaties in United Kingdom — European Communities Act 1972 — Definition of Community Treaties for purposes of Act — Power to declare a treaty ancillary to the principal Community Treaties to be a Community Treaty Undertaking on financing for supplementary Community budget — Whether reasonably capable of being regarded as a treaty ancillary to the Community Treaties

Relationship of international law and municipal law — Effect in municipal law — EEC Treaty, 1957, and subsequent Community Treaties — Effect in the United Kingdom — European Communities Act 1972 — The law of England