If compressor line is bubbling with system off, it's most likely NRV-1 allowing tank air to escape via the drier. The more the tank empties overnight, then the pump has to work harder in the moring to fill it & raise the car.
He can either clone or use the data to make a matching key with different key number. Had a long chat with him about it a while back.
Hence 4 options on the website.
Yes they can if you get the Lockset Barcode data from LR for the BECM in the car. If it's the original BECM, then LR just need ID & V5C doc to prove ownership.