From this week as per the NGF, https://www.golf.nl/coronafaq, four balls are once again allowed.
It is recalled the relaxation will apply nationally from 16 March. Then only the 1.5 meter distance applies in a flight of four. From that date, lessons from pros may again be taught with four adults at the same time. Young people up to and including 26 years old are already allowed to play together in one flight with more than two people.
Please remember the rules already in place and that when entering any building, for example, the toilets in the training centre, a mask must be worn.
At present we are restricted by ESA rules to play on the weekends