I would personally wear neutral makeup during the day that can be glammed up at night.
Then for night take off the jacket item and pop on some heels and a lipstick! The second look I wear is a formal but sunny work dress that I could then flip into a last-minute evening dinner look around the Knight bridge area.
A classic style, structured and sophisticated, which I would wear with flats in the day.
Go for a toned down makeup look and hair in a tidy up do.
Light chiffon or silk top to make sure I don't bake on the day with a pair or skinny pants probably a light neutral color.
As far as clothing goes I would bring a pair of heels and depending on the outfit, a beautiful jacket to make it look dressier.
A piece like that can completely transform a simple dress in a neutral colour.
Description: This one is especially helpful to me because I usually work on weekends and the dresscode is quite strict we have to wear all black and white, look elegant, wear natural makeup.