This would not be difficult; leather production is an extremely dirty process.
What they call "vegan leather" here is a synthetic material that try to mimic the desired properties of real leather. They claim it being more environmental friendly.
edit : I did missread your message by missing "This would not be difficult"
:)
It might be based on MIRUM, since I recall BMW (who own Mini) working with them awhile back. MIRUM is one of the few plant based leather “replacements” that uses no plastic - although I obviously don’t know if the material used in Minis is this and is 100% plastic free, just throwing some possible leads out.
I had a leather worker make me a wallet out of a batch of MIRUM I got a few years ago and they were surprised at how close it gets to working with leather. It’s certainly not perfect - or at least wasn’t back then - but it was apparently far more usable than the plastic backed alternatives. Still holds up today and aged decently well. If BMW/Mini are indeed using it finally, IMO it’s a win over their earlier alternative leathers.