Sadly she didn't make it.
Collected her from the vets, she was still a bit sleepy and gave her a drink of water when we got home. She died Friday evening, she just went to sleep and didn't wake up.
What a real bad day, all the worry of the anestetic and her getting through the operation and then she just passed away at home which was probably for the best rather than at the vets. My son buried her in her favourite spot.
I've now got over £40's worth of medication that I never used for her. I'm hoping the vet will take back, but will have to wait and see.