I have a client who is a Facilities Management company. They manage several site across the SW.

They have a newish client who have a cylinder fed gas system, it is over 0.5 bar so falls under the Gas regs. 

My client has, as part of their contract the duty to kep the cylinders full, so they monitor and replace the cylinders as needed but the client orders them.

There is now a discussion about who owns the rest of the system. I get that we have to produce the Risk Assessment for the cylinder change over but who writes the SoP about how the system is maintained, inspected etc etc.

I can write it but it comes down to who pays my invoice for this service, my client who has the facilities contract or their client who owns and runs the site?

Many thanks for response, thats the rub. The wording of the contract is a bit vague, nothing specifically stated.

My point was, if the system belongs to owner of building they write the SoP and we as FM company abide by it, or as the FM company do we write our own SoP, and if we ever lose the contract walk away with the SoP as it would be our company procedure not the owners?

For changing the gas cylinders this would be solely down to your clients contractual obligation.

As to the "rest" of the system this is one of those areas where co-operation is essential in fact given there are two sets of employers and two sets of employees it would be critical both parties document a common system to be followed by anybody working at site.

Last thing the tennant wants is their business having any form of gas disruption whilst the last thing your client needs is their contractual duty frustrated by tennant actions.