I know, swit swoo!
These socks are 'Toe-Up Traditional Socks'. The pattern is available in the pattern book 'Knitting 24/7' by Veronik Avery and features some stunning patterns and photography. Happily, this book was a Christmas present from last year - I am a lucky lady, thank you Angharad!
The wool I used was Regia Color 4-ply (a sock yarn). The multi-colour was wonderful to knit with as each stitch came out a different colour. I think the finished effect is like a Monet painting. Beautiful.