Honest question: what temperature scale is on your oven? My understanding is that it is likely to be Fahrenheit but I don't actually know.

As a Brit, I concur.

It is used for cooking in Canada even today. Here’s a UK weather report from 1987 that uses both Celsius and Fahrenheit: https://youtu.be/NnxjZ-aFkjs. Celsius is the default but there are living people in the UK who recall using the Fahrenheit scale. This is much less common outside the commonwealth.

Yes, they use both. Celsius primarily, but still both. Ask them how hot their oven is, or the temperature of the pool.

Yes, most people will. But that’s more than just America being familiar with Fahrenheit and allows for a disproportionately larger population of Fahrenheit-literate people in the commonwealth.

Australia and NZ had much more successful conversions to the metric system than Canada but there are people alive today who would have used the Fahrenheit scale early in their lives. Contrast this with non commonwealth countries who converted to the metric system 100 years earlier than the commonwealth.

UK Metrication: 1978 (partial)

Canadian Metrication: 1976 (partial)

Australian Metrication: 1988

NZ Metrication: 1976

French Metrication: 1858

German Metrication: 1872

Mexican Metrication: 1857

Even in the kitchen?