"Bathrobe locking" operation

[uk_dave&gill]

This thread made me wonder if my car has this option enabled, and also how it worked.

Did a few tests and found this:-

• Spare key in ignition, door shut, try to lock with blipper on other key and get a horn chirp and car won't lock
• Spare key in ignition, engine running, try to lock with blipper on other key and nothing happens (no horn chirp, and no locking)
• Spare key in ignition, engine running, try to lock with other key manually and it does lock, but no warning

Is this correct operation?