I wouldn't rule it out, though the flower looks more like scaly buttons to me. There are as of yet no records of button wrinklewort from the pinnacle so it would be good if you could get a picture of the leaves with this one.
I'll try and get a photo over the next few days - if the rain stops that is :o)) I've looked at the scaly buttons and they look very similar, so you are probably right. Learn a little more every day !!