With one thing and another it's taken me a while to update this; sadly, the ewe didn't make it.
She seemed to be on the road to recovery, taking her meds, eating an ok amount, drinking in good slurps, but just didn't make it through one night. The vet suspects peritonitis (excuse spelling). From the size and shape of her I suspect she was carrying more than two lambs (last year she lambed triplets). I've never seen a ewe so heavy and wide. V sad.
But the legacy of her lives on; last week, her daughter lambed for the first time, and like her mum, is proving to be a good attentive ewe. It took us all (especially the first time ewe) by surprise, one minute she was eating and grazing with all the others (taking in a bit of rare sunshine), next she was licking her baby. All is as it should be, a healthy and cute young lad; great mum.