It was not totally unexpected in light of everything that is happening at the moment. Parkruns official statement is:
The current situation for parkrun events around the world is detailed below.
*** UPDATE – 08.40 GMT Wednesday 18 March 2020 ***
Following government advice and public health guidelines, we are suspending events in Eswatini, Namibia, Russia, South Africa, and the UK from this weekend until at least the end of March.
With this announcement parkrun is now closed in every territory around the world until further notice.
ps If you are on Strava why not join the club group!
Take care when you are out solo training!!