Just spoke to the vet - really helpful
In case anyone else hs the same problem, here's what the vet advised:
* Inject Metacam (sorry - can't remember recommended dose. I don't have any so me brain switched off!))
* Keep the area clean
* The danger is that the vagina can be bruised or scratched while it is out, and possibly torn.
* If the prolapse doesn't go back in itself, with well-lubed hands, use flat of hand or fist to gently ease the vagina back in
* If it's due to heavy pregnancy, there can also be problems passing urine
* If she hasn't lambed by morning, one of the vets could come out and place a harness of her to hold everything in place. Normally this would be a two person job, with the farmer holding the ewe steady, but in viral circumstances, the vets are doing procedures like this single-handedly where possible, and with this it is possible
I'll let you know what happens...