Changing eurocylinder

[wedge69]

Hi,

I'm going to attempt to change the eurocylinder locks in a pair of patio doors. One side looks easy, as I can see the screw that needs removing to release the lock.
However, I'm not sure where the corresponding screw is on the other door. I've attached a photo, can anyone help me out?

 

[ronniecabers]

It will be behind the ' flying mullion '. You have two options, find all the screws and unscrew the mullion ( may be clipped on ) , or remove the silver lock plate and drill through a 10mm hole in line with where the screw should be that holds the barrel in

 

[wedge69]

Thanks. Now you've told me what it's called I can see lots of matches in Google!