Hope I've put this in the right place. I've just booked at taxi to take me on a journey about 1hr long then to collect me a few days later. I haven't ever travelled in a taxi before and they said I can pay half on the way there and half on the way back. I've been given a fixed price, do I tip the driver and if so do I tip him on each journey or just on the way back, as it will be the same driver. Also, if I tip how much should I give him? The total journey will cost about 100.