So there has been some beef recently about reservation amounts at pay-at-pump - here’s a news report
Monzo’s own Dan Chatfield blogged an explanation here
Monzo could add the option for customers to select their own reservation amount in the app for AFDs (Automated Fuel Dispensers). If the pump sends a pre-auth for £99, Monzo could respond with a partial authorisation and return the smallest of either the available to spend, or the personal pre-auth amount.
That way a customer can limit their reservation exposure to a value they’re comfortable with regardless of how much they have in their account.
If this could be implemented fairly quickly, there would be a bit of good PR and a way to attract more accountholders.