Replace external sliding door with internal bifold door conservatory. Can I ?

I was wondering if is possible to replace an old sliding doors with an interior bifold between my extension and conservatory. What would be the minimum spec accepted by building control?

Thanks

 

Minimum spec is an external grade door set, not internal.

 

Well, BC aren't going to know or care, are they? So, it's between you, your utility company, and the welfare of the planet.

 

Until you come to sell, then its all mad panic 2 days before you move as none of the solicitors picked it up till the last minute.

 

Home insurer?