I think we should do it. It's a good day out with some good racing. I note on their website they say:
If a race meeting is postponed, all tickets will be valid for the rescheduled event. if you let us know that you can't make the date once it's been announced, you will be entitled to a credit or refund.
If a race meeting is cancelled in its entirety, you will be entitled to a credit or refund.
If government restrictions prevent us being able to admit spectators to a race meeting, you will be entitled to a credit or refund.