[Cuddles]

Thanks guys, I've been trying to get hold of my neighbour to get a pet lamb from him without any success so he must have his own issues to resolve.  Its been 36hrs now and the ewe has calmed down quite a bit so unfortunately I think the window to get a foster lamb onto her has passed. If I'm wrong let me know.
I've also spoken to the vet so I'll go out and milk her a bit to release any pressure on the udder and keep an eye on things, hopefully she'll dry off quickly enough.

Kanisha, no such luck, I've been round the place two or three times but there is no sign of her at all.

Marches Farmer, the ewes came from Rosemary so I'd say the health status of the original flock was exemplary.

[YorkshireLass]

Sounds to me like you're handling everything thrown at you with sensible and timely actions.
Don't worry, you'll get different problems next year!