Keyless Vehicle Theft...
This story has a less technical viewpoint than expected (for me at least). "Keyless Vehicle Theft" means theft without a key (which I'd guess covers at least 95% of all car thefts). Not necessarily a keyless car. While the Met police article links to another one on the methods of stealing keyless cars, I'd guess this is the exception rather than the rule.
So, read "keyless" as "jamming a screwdriver into the ignition lock" rather than "mad scientist cracks OBD encryption key using an abacus and duct tape" in most cases.
I still wonder how complicated it really is to forge wireless keys from the available data (via OBD).