Thanks so much for the interest in our application!
A few people have asked how they can enable this and I just wanted to make it clear that this is not an official integration but something that was made using the developer API Monzo provides. While our application does support multiple accounts, the API is only meant to be used for your own account or a small user of users that have to be whitelisted to use the app.
In its current state, the app is not suitable to be used more widely unfortunately as it was created as a coursework project.
If anyone is interested in how this was made, I can confirm that it involved web scraping the TfL website using a Python script and using the Monzo API to push this data to a TfL transaction.