One of the client requirements is that all London Stuart Courier Partners in carry a £50 cash float when operating on the platform.
The process is the following: you pay for the order at pick-up with this cash float, you make your way to the drop-off, at which point the customer pays you and you are back with your float.
Please note if there is a cash order of more than £50, the client will not ask you to pay for the order at pick-up. You will have to ask support for a return job at the drop-off, and you will give the client the payment you have received for this order.
Here's a helpful link with a location of ATMs.
You know the good thing about cash orders: tips!!