I made my taxi reservation online to be picked up from Stansted airport at 00.05 am, arriving with an international flight. When we arrived there was no driver waiting for us. When we looked at the confirmation email, we noticed that the meeting point was at Domestic Arrivals, instead of International Arrivals which was where we were. It was confusing. We tried to go to Domestic Arrivals but could not enter the area. Then we called the office. It turned out that they made a mistake and on their side our arrival date was noted as one day later, and, therefore they did not send a driver. The confirmation email I got following my online booking was showing the right day, so they must have made the mistake when transferring the info onto a secondary system...They arranged a new driver quickly after our call and finally we were picked up with 1 hr delay. But we had a stressful hour on a very cold night trying to find the driver as we arrived, running between terminals, at around 1 am.