The foreign office has asked all British travellers abroad to return back to the UK now.

International travel is becoming limited. The British government has asked all travellers to contact travel operators now to arrange to come home.

https://www.gov.uk/guidance/travel-advice-novel-coronavirus

It is assumed the UK government is going to start shutting down borders over the coming days.

Boris Johnston will make a bigger than usual announcement tonight at 8:30 PM