Event1 September 2026Action

CPTPP enters into force between Canada and the United Kingdom on 1 September 2026

Global Affairs Canada announced on 3 July 2026 that Canada had ratified the protocol on the United Kingdom's accession to the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP). It said the protocol would bring the CPTPP into force between Canada and the UK on 1 September 2026, completing the UK's accession. The department said the UK was the first economy to complete the CPTPP accession process, and that the agreement complements the existing Canada-UK Trade Continuity Agreement. A Canada Border Services Agency customs notice confirmed that, as of 1 September 2026, eligible goods from the UK are entitled to the new CPTPP tariff treatment for the UK.

Date

1 September 2026

Kind

Agreement

Where

Canada

Evidence

Action: Something was done: a law switched on, a tariff imposed, money committed. How evidence is weighed

Who

Government of Canada (signed); Government of the United Kingdom (counterparty)

Sources

• Parliament of Canada (LEGISinfo), “C-13 (45-1): An Act to implement the Protocol on the Accession of the United Kingdom of Great Britain and Northern Ireland to the Comprehensive and Progressive Agreement for Trans-Pacific Partnership” (external site), 6 May 2026. source record
• Global Affairs Canada, “Minister Sidhu announces Canada's ratification of the United Kingdom's CPTPP Accession Protocol” (external site), 3 July 2026. source record
• Canada Border Services Agency, “Customs Notice 26-22: Amendment to the Departmental Consolidation of the Customs Tariff - United Kingdom” (external site), 1 September 2026. source record

Laws and agreements

• Protocol on the Accession of the United Kingdom to the CPTPP (Canada's ratification via Bill C-13) (Bill C-13 (45-1); S.C. 2026, c. 7): this event is its “In force” stage

Claims that rest on this event

• SupportsOutcome

  Europe is a real but small diversification channel, made of defence and resources. The binding items are Canada's agreement to join the EU's SAFE defence-procurement programme, the CPTPP trade pact now in force with the UK, Uniper's LNG contract and Germany's purchase of Lockheed Martin Canada's CMS 330 combat system; the rest (EU associate membership, the German submarine choice, SEFE's LNG deal) is non-binding. Canadian aluminum hit by US tariffs also went to the Netherlands and Italy in 2025. The EU took about 5.8% of Canada's goods exports in January-July 2026.

  Binding trade item.

How it bears on the outcome