I have read the wiki on GTF, and it says- if you record an item on the goods to follow list, you reserve the right to ship it to Canada, duty free, at anytime in the future,

Our shipping load will be shipped out of Rotterdam, but we have a couple of items in storage at my mothers in Scotland. We are unable to visit home before we leave for Canada, so, if we included the items on the GTF list, could they be sent separately from our main load, or are you restricted to one shipping consignment only?

Thanks in advance for any advice.

AFAIK as long as it's on the GTF list then it can come in at any time in the future, not necessarily in one shipment.

If you include on your GTF list the stuff that currently is at your mother's house, you can import it duty free into Canada at any time in the future (as long as you're alive, I guess). If you like, you can dribble it into Canada in many small shipments.

I will add a comment to that effect to the Wiki.
x