The entire Waterson/Carthy household has been getting attention
-- in more recent threads -- with cancellations and postponements,
the whole household testing positive for the coronavirus,
need to raise funds, and so on.

I'm using/refreshing this thread to focus on Norma Waterson.
To sum up:
When Norma's illness (possibly COVID) progressed to pneumonia,
she went to hospital, and into isolation.
Treatment with steroids/antibiotics proceeded.
The rest of the Carthys did not need hospitalization
but they had to stay home and keep testing.
Finally the tests came up negative.

Martin Carthy has had to cancel/postpone/reschedule repeatedly.
He is now testing negative for coronavirus and feeling better.

On 28 January, Eliza Carthy posted this Tweet:
So sorry.
Mam still isn't out of the hospital . . .
rescheduled to 12 Feb.

That possibly explains why Martin Carthy has postponed
his online/streaming performance to the end of February.
Mr. Carthy DID however get in a live performance recently.