Since this morning I have had 'Emergency Calls Only' displayed on my phone.
Was working fine last night and the SIM card has been in place since at least April 2019 (cannot remember if I got a new SIM with my new phone then)
Have tried restarting phone (Huawei P20 Pro), turning phone off and back on, turning airplane mode on and back off, removing SIM card and reinstalling. First three numbers on the card are '318' so not one if the '319' batch. Have checked account on Virgin Mobile website and there do not seem to be any issues there.