The fuel cutoff switches are of a similar design to the 737 and most other Boeing aircraft. A failure in that design seems less likely than the most charitable explanation, that the copilot inadvertently went into the wrong mode of muscle memory.

The interim report does mention the SIAB NM-18-33. If you read that document it specifically says that the fuel cut-offs were installed with the locking feature deactivated on some 737 aircraft. It's a pretty big leap to that causing this incident. Someone or some thing would still need to have touched the switches to move them.

... which is more than the bbc one paragraph news item does?