I was asking cojak, who said that as a statement of fact "It's known that the FCSA has dodgy umbrellas on its books.". I've not seen any evidence that any FCSA accredited umbrellas are "dodgy" but admit I've not reviewed the whole list.
Umbrellaphant - yes, on the face of it, it's hard to see how the meet the "advertised" FCSA requirements (as per the website), but that does not make them dodgy.
If asked how they gained accreditation, I imagine the FCSA would say something along the lines of "That's something I keep for sales conversations - it's not something I would reveal in public."
It'll be interesting to hear if anyone can actually point to any that are actually "dodgy".