Is there any guidance on whether the final exit door should be fit with a closing device?

There could be situations where a self closer would be required but in most situations self closers are not required on final exit doors to open air. If a means of escape has to pass close to the door on the outside, like an external fire escape and there are other situations, then self closers would be required.

Hi. Is there a code that supports this as I need it to back an argument similar to this. Thanks.

Not that I am aware but it is common sense because the self closer is designed to keep a fire door shut to prevent it accidentally being left open and allowing a fire to enter the escape route which is very unlikely from the outside.

In most situations the final exit door to outside doesn't need to be fire door because in most situations the escape route is not threatened by the outside, but in certain situations the outside could be an escape route and threatened by the inside, this when a self closing fire door is required. 

I'm confused, I've read all final doors should have closers to prevent oxygen being fed to the fire?

Read where?

 

12 hours ago, AnthonyB said:

Read where?

Ditto

That would create one hell of a vacuum making the door all but impossible to open

Once you could get a special final fire exit door closers, that was always acting as a closer until a electro/mechanical interrupter made it free flow. (opposite to a normal internal door closer) are these still available??

A swing free self closer?  https://www.safelincs.co.uk/free-swing-door-closers/