Sorry, No photos but this is how to remove.
Remove the door seal where it covers the A post trim.
Fingers behind the A post trim (door edge and screen edge) at the top and gently ease inwards to release a springy fastener.
Once that has released pull the trim gently upwards towards the sun visor to release the lower "slide in" clip.
You may find that the housing on the trim for the metal lower clip is split. You can glue the metal clip back in using araldite - works fine.