The year you move into Canada you will be considered a part-time resident only for Canadian Tax Purposes, that means that you only be liable for Canadian Taxes on Income earned in Canada. However, if you continue residency (living in Canada) for a subsequent year, you will be considered a resident of Canada for tax purposes and you will be taxes on your worldwide income (including passive income in the UK). However, at that stage, you should look more closely into the Canada-UK tax treaties so you may be able to pay taxes only once and in one country only.
P.S. Resident of Canada for Tax Purposes doesn't have anything to do with your immigration status in Canada.
Cheers.