As I just mentioned in Make some notifications optional
would be good to silence those daily TfL 4am notifications.
There is some feature on their board for TfL integration - https://trello.com/c/88EFKpMU/23-integrations-with-tfl-nectar-etc-🚅
Since adding notification on/off configuration for vendor/senders, it wouldn’t be stretch to customise the notification sound. Fanfare/crowd cheering for the monthly pay, choo choo for TfL etc. 