Thank you everyone.
Cleo ate very well tonight,she seems to like the sweetness of mashed pumpkin and creamed sweetcorn,diluting the protein.I got a gourmet tin of various fish/chicken flakes for her to try with it which she liked and came back for seconds. I was cooking brown rice for myself so I did some for her, I'll mash it down in chicken broth when I get some chicken to make it with on Monday. she hasn't shown great partiality to rice so we'll see how she goes. I am going to talk to the homoeopathic vet clinic which is more local than the specialist cat hospital, about some fluids.
I'll post again next week and let you know how it all goes.