Is there a specific ad there, the link just shows ads containing "PCO"?
Anyway, by the way it's described, it could be a PAYE job, which could be a good thing. However, you'll loose the flexibility compared to working with Uber, as the shifts will probably be set times, and you have to complete all jobs given to you. You may also have to travel to the office to collect and drop off the car at the beginning and end of each shift at your own time and expense, as the car is probably used by another driver between shifts.