0Xf0rd

I am a dual citizen of the US and Canada and hold passports to both countries. I am a resident of the US. In the Oxford application, you are asked to put the passport number of the passport on which you will get your visa. I was wondering if there are pros and cons of applying on an American or Canadian passport to the UK (cost, acceptance, etc.). Can I even use my Canadian passport if I am a resident of the US? Thanks!