The UK government has now released immigration guidance for Chinese nationals, and others, affected by the Coronavirus travel restrictions. It was published by the Home Office and UK Visas and Immigration (UKVI) on 17 February 2020.
A Coronavirus Immigration Helpline, and email address, also went live on 18 February 2020, for immigration enquiries related only to Coronavirus:
We have updated our web info with this latest guidance. See Coronavirus (Covid-19): info for international students and Coronavirus (Covid-19): info for members.