Many more people may be forced to self-isolate as part of efforts to stop the coronavirus spreading in Britain, the head of NHS England has warned.
Sir Simon Stevens said more than 80 people discharged from quarantine on Thursday set an "important example".
Meanwhile, officials are tracing the contacts of the ninth person in the UK to test positive for the virus.
The woman went to hospital in an Uber, but Public Health England (PHE) said the driver is not at "high risk".
The new case - announced on Wednesday evening - is the first to be identified in London after she contracted the virus in China.
She "self-presented" at the A&E department of University Hospital Lewisham on Sunday 9 February, hospital chief executive Ben Travis said.
PHE said the Uber driver is "not considered high risk" because the journey was less than 15 minutes and there was not "close sustained contact".
Uber said it had temporarily suspended the driver's account "out of an abundance of caution". Asked if it would be compensating the driver for lost income, the company said: "We will be providing support to this driver."
GMB legal director Susan Harris said: "If Uber is genuinely concerned for his well-being - or for that of the public - they must make sure he receives payment during this enforced period of unemployment."