Yes, i do have someone to recieve my post and yes my partner is Canadian.
As you are moving back to the UK, I would be tempted to use that address for residential and mailing.
Explaining about your current stay in SK only in the attached letter.
It may prevent communication issues in the future.
IMO, by the time the spousal section has been approved you will be very close to living at the UK address.
My question about your spouse was not about citizenship, if he is in Canada then the Canadian address may be better for the mailing address. If not, ignore my comment
