The process takes as long as it takes.
If your husband is a Brit' citizen he can travel to Canada for a visit, without a visa (visa exempt).
He will not be able to work in Canada, and as you are applying outland, if an interview is required he will have to return to the UK.
If approved, his passport can be sent to London and will be returned to Canada, no need for him to travel back for that.
If your husband is a Brit' citizen he can travel to Canada for a visit, without a visa (visa exempt).
He will not be able to work in Canada, and as you are applying outland, if an interview is required he will have to return to the UK.
If approved, his passport can be sent to London and will be returned to Canada, no need for him to travel back for that.