Hello Mark, I suspect the tumblers are stuck in your ignition lock cylinder. Try this procedure. I have had success in the past. Spray a little WD40 into the lock cylinder. Just a little. Insert your key, tap on the key lightly with a hammer while putting a little pressure on it to turn, see if it frees up and turns.
Your JA Expert,
I had to work with it for a few but it did finally free up and turn. Engine starts no fault lights illuminated on dash... all is well. What do you recommend if this happens again?
Actually no procedure needed. Here is the notes related to replacing the lock cylinder
The ignition lock cylinder and keys do not contain any coded electronic components. The lock cylinder housing contains the coded electronic components. Changing an ignition lock cylinder or replacing a key is a purely mechanical process which does not affect the vehicle theft deterrent system. To replace an existing key, simply cut a new key to match the existing one. If no keys are available, the lock cylinder must be changed. To change the lock cylinder, simply replace the existing lock cylinder with one of the same type.