Randomly the ignition key will not enter the slot - a protective metal shutter closes the key slot and will not budge until one has tried both keys and panicked about how is one going to get home and then the key can be put in the slot.
Is there a way of lubricating the key slot shutter or a way if easing open the shutter with a pin /nail etc. Looking at the key slot at the moment the shutter is not visible, so the key can enter with no problem.
Thanks for any info, the thought of a new key barrel and set of keys with the attendant marrying is not a pleasant thought.