The city of Wuhan, where the COVID-19 outbreak started, will remain locked down until April 8, officials said.
Health officials confirmed that some 242 people had died from the flu-like virus in China’s Hubei province on Wednesday.
94 UK nationals and family members have already been evacuated from Wuhan.
Dominic Raab says government is working "around the clock" to evacuate UK citizens from Hubei Province.
The government said it was working on plans to help British nationals leave Hubei province.
One British man in Wuhan complained that the UK Embassy in Beijing has been "conveniently closed for the weekend".
Lunar New Year celebrations have been cancelled across the country as the virus continues to spread.