What’s happened to the Nightingale hospitals?

I understand the Manchester one is being used for general medical cases to free up room for patients suffering from Covid in the main hospitals.

the Exeter one is for Covid patients but the incidence is low
Yes, Casdon, you're right. We are blessed with outdoor places to have fun. Judging by the number of people out and about today our hospitals will be dealing more with frozen surfers in the sea and broken legs climbing on Dartmoor!
Our rates have been dropping for a couple of days here.

That’s good news Ellianne (number dropping, not broken legs).
Matt Hancock mentioned the Nightingale hospitals yesterday and said they are still available to be used.

I think that is why the people of Devon and Cirnwall were worried about so many visitors descending on the area this summer. Not so much because of covid, though that was a consideration, but more because our emergency services here are stretched to the limits over a huge area. Sea rescues, injuries on the moors, traffic accidents on windy lanes etc. Tourists place an extra burden on the hospitals, which is fine, but covid patients on top would be a nightmare.

Plymouth's Derriford hospital has received covid patients from Kent today.