Orkney - Sanday, Eday, North Ronaldsay and Stronsay: 465 (OS Explorer Active Map)

Having visited these places a long time ago, I'd forgotten a lot, besides some things have changed, but not a lot. Suerb map.

Just what I needed

On a recent visit to Orkney I found the OS Explorer Map Series a great help. They are superior to the OS Landranger Maps if you want the fine details of each island.