Seems a bit unfair on the younger people who may not have been double jabbed by the start of the season.
One jab should be enough, all over 18s have had the chance to book a jab by now.
Obviously there has to be exceptions for those who can't for medical reasons, but (if they should even be there in the first place for their own health) even if they can't get a jab, they can still produce a negative test and be allowed in