The government has announced a series of precautionary and
  temporary measures to further improve the UK’s ability to detect
  potential new variants of Covid from China, following an increase
  in cases there and the easing of their border measures next week.
  Passengers arriving from China to England from 5 January
  will need to show a negative Covid-19 pre-departure test (PDT)
  taken no more than two days prior to departure. Although there
  are no direct flights from China to Scotland, Wales or Northern
  Ireland, we are working with devolved nations to ensure this
  is implemented UK-wide as soon as possible.
  The decision has been taken to introduce these measures
  specifically for China arrivals due to a lack of comprehensive
  health information shared by China. The situation remains under
  review and the UK is working with China on next steps. If there
  are improvements in information sharing and greater
  transparency then temporary measures will be reviewed. 
  The volume of passengers from China remains low – however, as a
  precautionary measure, following the re-opening of Chinese
  borders in January, the government has announced that:
  - People travelling from mainland China on direct flights to
  England from Thursday 5 January will be asked to take a
  pre-departure Covid test. The government is working with
  international partners at pace to determine scope and will
  announce further details in due course.
  
 
  - In addition, the UK Health Security Agency is launching
  surveillance from Sunday 8 January which will see a sample of
  passengers arriving in England from mainland China tested for
  Covid at the point of their arrival. 
  
 
  Airlines will be required to check all passengers from China have
  negative pre-departure tests, and passengers will not be allowed
  to board a flight without providing evidence of a negative test
  result.   
  Passengers at Heathrow will be invited to take part in the study
  and all positive samples will be sent for sequencing. This will
  further enhance the UK’s ability to identify any new variants
  which may be circulating in China that could evade the
  immune response of those already vaccinated or which have the
  potential to successfully outcompete other variants and spread
  internationally. 
  England joins a growing list of countries across the world
  including US, Italy, Japan, Republic of Korea, Spain, Malaysia
  and India in announcing measures which will help to detect and
  assess any new Covid variants. 
  The available genomes from China and from other countries where
  testing has occurred suggest that the variants circulating in
  China are the same as seen in the UK and elsewhere in Europe. The
  UK has a number of surveillance systems in place to detect the
  prevalence and spread of new variants and the UK’s sequencing
  data is shared rapidly to help support global awareness and
  health security.
  Whilst there is currently no data to suggest there are previously
  unknown or potentially harmful variants circulating, the new
  surveillance measures will help detect them if they do arise.
   
  The best form of defence against the virus remains the vaccine.
  Eligible people who are most at risk of serious outcomes from the
  virus can book their jab via the NHS app, or the National Booking
  Service, or they can just turn up at of the thousands of walk-in
  centres across the country.
   Secretary of State for Health and Social Care
   said:
  “As Covid cases in China rise ahead of them reopening their
  borders next week, it is right for us to take a balanced and
  precautionary approach by announcing these temporary measures
  while we assess the data.
  “This allows our world leading scientists at the UK Health
  Security Agency to gain rapid insight into potential new variants
  circulating in China.
  “The best defence against the virus, however, remains the
  vaccine. NHS staff have done an incredible job delivering over
  150 million jabs across the UK.
  “It isn’t too late to come forward, for your first, second,
  third, or autumn booster – it’s quick and easy and you can book
  online, on the NHS app, or just turn up at one of the many
  walk-in centres across the UK.” 
  The government recognises the impact that temporary health
  measures have on the travel and aviation industry. These testing
  requirements for travellers arriving from mainland China will be
  kept under regular review.
  Prof Susan Hopkins, Chief Medical Advisor at UKHSA
  said:
   “The UK Health Security Agency (UKHSA) continues to closely
  monitor the prevalence and spread of new SARS-CoV-2 variants and
  keep available international data under review.  The
  evidence suggests the recent rise in cases in China is due to low
  natural immunity and lower vaccine uptake including boosters
  rather than the emergence of new Covid-19 variants - unlike in
  the UK where vaccines are maintaining high population protection.
  But in order to improve our intelligence, we are enhancing our
  surveillance, in addition to our current routine testing
  protocol.
  “COVID-19 cases continue to rise at home too and it remains
  important to try to stay at home if you are unwell, wash your
  hands regularly, try to keep rooms well ventilated and remember
  the best protection is to get your booster jab if eligible.”