Do i really need a sidelight couple

[ricardo100671]

I am designing a door with Solidoor designer and one of the option is to ommit the coupler, which is me preference. The overall door dimensions are 843 Door +357 sidelight. 

I assume, without the coupler the two are screwed together for each side, with mastic between ?

Would this pass Building Control ?

 

Edited May 7 by ricardo100671

[nod]

I’d put one at either side on our last build 

You will need the coupler