Mobile roaming in the Channel Islands

I have travelled to the Island of Sark, part of the Bailiwick of Guernsey. Lebara has welcomed me to Jersey then Sark and now France all while not leaving Sark. Will my roaming add on for Guernsey apply whatever?

No not counted as part of roaming jersey or channel Islands

Thanks for reply. I have purchased the upgrade for Guernsey so I should be ok. It is just advice that you may receive confusing messages regarding your location in certain places.