Apologies for never replying, I've had a busy summer revising and in practice.
Out of the 2 that lasted more than 5 minutes, 1 died after a couple of hours, however the Charlie as she is affectionately known made it. We syringe fed her water for the first 12 hours, however within 2 days rather than falling over and only being able to turn in one direction with an intention tremor. Charlies suspected cerebellar hypoplasia resolved and she's now a fully grown duck living with a flow of other runner duck friends
So what I've learned - is to not give up on them
Thank you for all the nice comments above
