First things first: Some photos from Shetland
I only visited three places (I confess it was a bit chilly on Twister and that that swayed my decision to head back to Bergen and the shore-power-powered fan heater rather than explore more of Shetland.): Lerwick on the island of Mainland, Symbister on Whalsay, and Out Skerries. Shetland was settled by Norwegians back in the day, so norse words abound in the names - Lerwick = Leirvik = clay bay or muddy bay, Whalsay = hvaløy = whale island, Skerries = skjær = reefs/rocks. The Out Skerries is a group of small islands with a population of 55 by one residents estimate. Unlike the other places, Out Skerries appeared to be in decline/decay. Fishing is the only industry, they are somewhat isolated, and the population is possibly below critical mass. A ferry which comes a few times a week but is often prevented from entering the somewhat treacherous harbor by the weather. Whalsay is home to many of the Shetlands big fishing trawlers. In Lerwick, I met perhaps as many people not from Shetland as locals. The oil terminal at Sullom Voe employs some, and the construction of a new gas terminal has brought a new batch of workers. Many of these are housed on a hideous zebra-colored barge from The Netherlands and a cruise ship.
On the return passage, I was able to transit through both the UK and Norwegian sector of oil rigs