The British High Commission in Ottawa is the principal UK Diplomatic post in Canada. The High Commission is responsible for all aspects of the bilateral relationship with Canada and is the sole issuing office for UK visas and full British passports.

There is a wider network of Consulates and Trade Offices throughout Canada. Consulates look after British interests in general in the district where they are based, and carry out a number of consular services. Trade Offices identify local opportunities to develop trade between the UK and Canada, and report to the British High Commission in Ottawa.