Looks fine @paul.cartQaAzBT79- they can sometimes sit [annoyingly!] for a while at that stage, and you think they're never going to open, then suddenly - there they are The outer petals occasionally get stuck a little if you have a lot of greenfly on them [hence the ants] because of the honeydew they secrete. It's often just a case of wiping them gently if you don't have enough rain to unglue them, but I'd wait a few days yet before doing anything. Check them anyway.
I wonder if it's a Sarah Bernhardt https://www.waltersgardens.com/variety.php?ID=PAESB