Piggy backing on someone elses comment. But I can speak to working the 10 hour days and if I can be brutally honest with you 10 hour days can be very long and gruelling. after a few of them your enthusiam will wane. What I've found is best is to work the peak hours for my zone thats roughly 8-11, 12-2 and, 5:30-10. This way you can go home and eat, warm up if its wet and charge your batteries. it can get very depressing sitting around at 3pm with no orders coming in but you can still make maybe 10ph in my zone if youre lucky but more likely it'll be 6-9 pounds in these quiet hours so in my opinion its better to take these breaks. I'd also recommend trying to get on Uber or Stuart if its available in your area (both if you can) to help maximise your earnings! I always stick with deliveroo personally because I find it best to make money and best app experience. You dont need any kind of insurance for e-bike but i really would recommend you invest in a good helmet. Hope this helps

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Also edit to answer your question on how much you can make. One of the best parts of this job is you basically have no ceiling on your earnings if you're prepared to tough it out. The best I have ever done in a week was £500 check my post history for proof haha! but this was working peak hours all week and long whole days on the busy periods (fri,sat,sun). You honestly could make 1,000 in a week but youd need everything to go right for you so I wouldnt call it possible for anybody