If you have pre-booked for a specified pick-up time, we will always do our best to ensure your drivers reach you on time. Occasionally delays such as unforeseen traffic may result in a driver arriving later than expected in this case you can use the Yalla app to contact your driver directly and they should be able to advice an expected arrival time. If ever you have feedback regarding a drivers arrival time you can contact us via live chat or by email to support@yalla.uk