How to remove a Roca dual flush operating plate for concealed cistern

[talktalk]

I need to adjust the large flush button because water continues to run after the cistern has filled up and the button does not return to its proper position, it stays depressed. The small flush button is working OK.

In which direction does the dual flush operating plate need to slide/be moved?

 

[Ben-gee]

I think that one has springs at the bottom.
So you pry the top away from the wall whilst applying upward pressure from the bottom, then once the top is free you push the whole plate downwards to disengage from the springs.
Easier to do than to say!

 

[talktalk]

So you pry the top away from the wall whilst applying upward pressure from the bottom, then once the top is free you push the whole plate downwards to disengage from the springs.

Yes, you were right, I have fixed the flushing problem, thanks very much.