Hi all. I am building a small storage room in my coffee shop and due to the size of it (L2.5m x D1.4m) I would ideally have a folding/pocket door installed on it. Is that something I can use or do I need a specific type of door? Thank you! 

It is likely you will need an FD30 door and you can get such a pocket door that meets those requirements but not a folding door to my knowledge.

Depending on the size and layout of your shop, the fire detection provision and the contents of the cupboard (e.g. just storage or storage and an ignition risk such as an electrical board) your Fire Risk Assessment (which will now require review as you are carrying out a significant change) may determine a normal door is acceptable, or an FD30 or FD30S fire doorset. 

Usually if determined to be a place of special fire risk you are looking at FD30 (30 minute fire doorset with intumescent seals) or if needed to preserve a protected escape route the door is on a FD30s door  (30 minute fire doorset with intumescent seals & cold smoke brush). If you do need a fire door it would need an EN1154 approved self closer unless infrequently accessed where, as a cupboard, it can be kept locked shut instead.

I can't commit for sure as I haven't seen the premises.

As long as you do not store anything flammable, you can have any door you like, you just need some management controls as to what can and cannot be stored there under a risk assessment.