How to remove the door lock barrel?

[OzzieNorm]

I can't get the key to slide into the driver's side door lock - and have not been able to do so since I picked up the vehicle. Was one of those things I had to get around to fixing. So, today is the day.

I wish to remove the barrel - either to clean or to take to a locksmith to ascertain the why of the key not entering. [Key broken off inside?]

What is the barrel removal process? Please.

Pls see image.

I have removed the 'E' clip and the rod.

I also removed the slide-in 'U' clip against the door skin - but could not see what was its function , so, I reinstalled that clip.

What might be next?

Thanks