Well done
@T4tomo, spot on.
It would have been difficult to see this without knowing what you were looking at, but the uneven skyline is the line of dunes beyond which there is a huge area of sand. This is used as a bombing range so is sometimes a no-go area during the week. The guidance we were given was to keep an eye on the radar device on top of the square building - when that stops rotating there will be no more action that day. Typically this happened in early afternoon, after which we could walk out to survey the damage and go for a swim with the seals. I suspect some of them had been through the rescue centre a little further down the coast. The would swim up to a few feet away when we were on land, and one brushed past my arm when swimming. I suspect that swimming there isn't particularly safe, but sometimes these things have to be done.
The house was a good size with a large wildish garden, and our own path across the dunes to the sea. From the garden it was impossible to hear any road noise. It was a place I couldn't have recommended more highly, but sadly I had an email from the owner in around 2018 to say that it was permanently withdrawn with immediate effect.
Hidey-hole was hinting at (Donna) Nook, as I'm sure is now obvious.
Looking forward to the next!