OK, those are the weirdest frog tadpoles I have ever seen, Figgy. So, since you spotted the newt, I looked up newt babies, and guess what??? I am wondering if yours are newt taddies! Do you know the type of newt you have in your part of the world? Also, Mr. Pond, yours are very different than frog tadpoles in my neck of the world, too. The pics you posted are outstanding, love the close up details, especially the blue eyes.
Here is a website on newts, and it shows pics of the babies, which I assume are also called tadpoles. It's those multi parted toes/legs that were emerging on the photo above, Figgy, that had me searching for some answers. What do you think?
http://en.wikipedia.org/wiki/Newt