If you are in the Consular area of Vancouver, Canada then you can call on the British Consulate in Vancouver for assistance. Note the operating hours of the consulate if you need toif you no longer have one due to theft of loss. Wanting to take your Canadian wife back to the UK with a or a if you are not married yet.
British Consulate-General in Vancouver
*** If you need a visa for Britain then speak to the staff at the British Embassy in Ottawa for more help and assistance. This consulate is not setup for visas.