What do you mean 'fire loading'?  This term usually relates to establishing the heat output of a theoretical fire. The fire loading in a tyre workshop is most likely to be far in excess of its neighbouring stone mason for example.

I cannot imagine display rquipment adding significantly to a space's fire loading unless its a huge media wall.

Perhaps the biggest risk in your business is ensuring fire stopping is carried out where the compartmentation has been breached by cabling or where fire resisting walling has been removed to enable flush mounting. It seems sensible to me for you to ask the client to highlight which walls, floors and ceilings are part of the fire compartment, and what rating their fire resistance is.

Then in you method statement, you could determine how you will fire stop to achieve the same level of protection both during the works and after on completion 

What do you mean 'fire loading'

I probably should have been clearer here but I think you got what I was referring to. What I suppose I'm asking is will our screen/installation of our equipment impact significantly on the fire loading of the premises. Connected to this - are we obliged to provide any documentation to prove that it is all safe etc

Perhaps the biggest risk in your business is ensuring fire stopping is carried out where the compartmentation has been breached by cabling or where fire resisting walling has been removed to enable flush mounting.

This is a good point. I think this is probably something we definitely need to raise with the building manager at the point of design approval. With regards to the method statement we already list out where we install fire stops.

I doubt the completed installation will add significantly to the fire load in most commercial premises... But... How much expanded polystyrene, polythene bubble wrap, cardboard and wooden pallets do you import during delivery and installation? How do you minimise the potential problems these materials may cause? Control may be simple... Or it may be completely absent...

Odd's are it will add nothing to the potential but it is the fire stopping for the flush mounted screens that need the attention as the fire could spread through the inside of the wall without immediate detection.

There are a lot of products on the market, we insist that the wall has the same rated fire protection as when it was installed so the identification of fire walls is a must.

Building Regulations Approved Document B states that 'any penetrated fire rated wall should be reinstated to its original fire rating'.