We are a company providing electrical/mechanical sortation devices (think big parcel sorters). We are entering the market and I want to understand our H&S obligations under UK law. We do not wish to assume the role of a contractor and instead we wish to simply sell our technology. For this reason, we subcontract our installation work of these devices to a number of small partners. Whilst I understand that we cannot absolve ourselves of a duty of care to both our own employees and the contractor, I am trying to understand the delegation of H&S responsibilities in relationships where work is subcontracted.
I understand this may be vague and so any pointers to reading/material would be greatly appreciated.