What Roy's referring to is "Soft" and "Hard" PFI. Where departments such as Medical Physics equipment maintenance and EBME are generally considered "Hard" - more consideration has to be taken regarding the consequences of outsourcing because of the associated risks - financial and otherwise. "Soft" services such as catering and housekeeping, for example, may not need as much consideration when deciding whether to PFI or not. What Roy says is probably true but we were outsourced a couple of years ago even though we were part of a "Medical Physics" department.