The CRU has published a regularly-updated Queries List, which includes the following.
Asked "Will due consideration and planning be given to generation facilities who may become unavailable through the inability of international “Original Equipment Manufacturers” to undertake necessary maintenance or outage work, and that penalties would not be applied?" the regulator replied:
"Due consideration would be given, taking account of the CRU’s duties and functions, market rules and the system’s security of supply status. This would include the issue of penalties, if relevant."
Source: CRU, COVID-19: Technical Questions and Answers for the Energy Markets Queries List Number 1