They never go in the car together . Mostly the boys go in groups and so do the girls. Then they pair up to walk along the red carpet together for the photographer. That's it then, unless they are actually a couple.
He's ordered a white orchid for her. (it's tonight, he ordered it 2 hours ago
He didn't actually invite her, someone at a party was with the two of them and sort of told him to take her and she was keen, so he's kind of been blindsided . They're not even going in the car together so God knows when he's supposed to give it to her.
Yes it is. It should match or complement the colour of her dress. He may or may not have been privileged to see the dress but she will at least tell him the colour for this purpose . Last year DS paid £10 for one from a flower stall.