A production of Endgame starring Daniel Radcliffe and Alan Cumming has been cancelled due to the coronavirus.
London's Old Vic Theatre is among the first to pull performances and said it made the decision "with great sadness".
Prime Minister Boris Johnson is expected to discuss the banning of mass gatherings at a meeting on Monday.
The Samuel Beckett play started its run on January 27 and was due to continue until March 28.
The theatre urged those who had purchased tickets to consider donating the cost back to the organisation.