@"let alone the distraction for the senior staff."
ha, more like senior staff willing to waste "tens of thousands of pounds" to avoid being in the spotlight and/or having to answer difficult questions like "who thought this was a good idea?"
My personal experience with project managers is that there is a lot of varience in their technical competence. Some requiring several different others to do all the technical assessment each with their own technical blind spots and bias. The best were the ones that could do the technical assessment as well as arrange for everything to occur at the right time, sadly many non-technical managers see project management as a chargable checkbox that, they feel, requires more relating to them than the actual task to be managed