I wrote and designed Brütal Göry Fäntasy Rölpunk!!! Anarky in the Reich!!! entirely on Scottish public transport. It’s some kind of WHFRP simulacra, written without access to any WHFRP material. Because I was on the bus or train and my first edition handbooks are 1000 miles away.
I might bring some copies to Dragonmeet if people like it. Enjoy.