The EU card legality page has been updated. A tweet from the Yu-Gi-Oh! EU crew also reports that the current YCS Prize Card, Chaos Emperor, the Dragon of Armageddon, will still be illegal for use during YCS Sydney until the monday after the event, as is usually the case until the prize card is awarded in the region.
Card Legality page: https://www.yugioh-card.com/uk/gameplay/detail.php?id=426.
Source: EU Twitter.