I tried to rent a car from Green Motion in London but they denied me to rent the car as I only had a Monzo card with me. I had also already pre-paid for the car rental online with my Monzo card.
The reason they stated is that they no longer accept renting to people who use Monzo as they have had cars stolen in the past by people who have used Monzo.
I have previously rented cars from other Green Motion branches in the UK with no issues.
Posting this more of a caution than a question as I don’t want other people to have the same hassle.