Hi @Geraldine261 - assuming you booked your trip before the pandemic, you'll likely be able to get a refund if the extenuating policy is extended. Right now it covers until the end of June, so it would be too early for you to cancel. While August sound like a long way away, I wouldn't be confident you'll be able to travel, shielding or otherwise.
It's effectively a waiting game now.
That said, your travel insurance should cover you if everything else fails.