Upvc French door help

[sparks]

I need help with way to remove the trim on the slave door to access the cylinder screw. I've seen videos showing to drill through but don't really want to do that. At some point I may need to access the locking mechanism. I've removed the top and bottom pieces and all the fixings that the other door locks into.

First pic is all fixings removed
Second is the trims removed from top and bottom
Third is view from the top of piece I want to remove

Please can anyone help with suggestions?

 

[sparks]

It's been quite some time now and still no reply or advice.

Can anyone help with this?

 

[browney]

You may have to take the unit out, most likely screwed in through the rebate.

 

[sparks]

You may have to take the unit out, most likely screwed in through the rebate.

I did think that but the screw that holds the cylinder is definitely screwed from the outer edge.