In US terms, this is a front post double crochet (fpdc).
How to do it:
- yarn over
- insert hook around post of previous stitch, from right to left
- yarn over
- draw yarn back around the post (3 loops on hook)
- yarn over
- draw yarn through 2 loops on hook (2 loops left on hook)
- yarn over
- draw yarn through 2 loops on hook
