Can I change a double door fire exit to a single door ?

[Tara]

I am currently refurbishing a shop unit. I have a set of worn out aluminium double fire doors and would like to change them to a single fire door minimum width 750mm. Is this ok ?

[Tom Sutton]

It all depends on the layout and if the maximum numbers who are likely to use the door is less than 60, it would be acceptable.