For Pride London this year, I did my own makeup. Since I was not good at it, it took me 2 hours to do so. Add another 2-3 hours for commuting to London and another 2 hours before the Parade began, that was a total 6-7 hours preparation. Unfortunately my face got really oily then.
For Pride Brighton, I hope someone from the makeup counter can help me with that. Perhaps a makeup of just 1-2 hour before the parade will minimise the "oily face" problem. I went to one counter and bought a skincare product and then asked for advice about makeup on an oily skin. I also ask for her help to do my makeup (will be contented with a simple one).
Fortunately, she was very enthusiastic and end up doing a full makeup. Very heavy eye makeup too. Her colleague said I look like Jessica Rabbit. I had several girls shouting at me during the parade, "You look gorgeous". Thanks, Nadia!