Distance between fire exits

[Mark Wright]

Hi, I need to know if there is any regualtions around distance between fire exits. I am having a cold store room installed into our factory which will have a fire exit at the rear which then goes stright into the rear fire exit of the building, about 1000mm. In order to gain access to the fire exit, you need to enter into the cold store and then proceed to rear of cold store and then exit into street. I have attached plans below. Any advice on this would be very welcome.

[Tom Sutton]

Is the corridor also a means of escape from the warehouse and can both the doors from the cold store be opened from the inside, because both are fire exits.