Eventually have found the time to play about with Ulla-May's great tutorial https://www.annaaspnesdesigns.com/create-an-artsy-sketch-effect/ Not wholly convinced I got it right this time as I kept getting distracted but I'm happy with my page nevertheless and will definitely re-visit the tutorial with another photograph... I took this while we were climbing the Oslo Opera House last October.

ArtPlay Palette Neige
https://www.oscraps.com/shop/ArtPlay-Palette-Neige.html