We zoomed over as quickly as we could to pick her up we were shocked at how young and very cold she was. We've never looked after one younger than about 6 weeks old and weened.
I tucked her in the warmest place I could think of for the journey home, and was relieved when she started wriggling around after half an hour. Thankfully her spines were still very soft so she didn't prickle me at all. However, her wriggling wasn't normal. Baby hedgehogs are very active at two weeks and she was just a bit too limp. Her fight had gone and we knew it.
With the help of a neighbour who has all sorts of emergency bits and pieces she was tucked on a heat pat, and fed with puppy milk several times over the course of the twelve hours that followed.
Unfortunately she didn't make it.