Taking Oceania Sirena to British Isles April, 2024. Ports of call are: Edinburgh, Kirkwall, Stornoway, Glasgow and Holyhead Scotland. Then Belfast,Dublin, Cork Ireland, Finally Plymouth. I'm concerned about shore excursions and the best use of time in each port. Any and all suggestions and opinions will be greatly appreciated. If you have taken a shore excursion to any of these ports, that too would be very helpful.