It's always been the case that only Westminster has that rank - Paddick's posting here was the exception, and the perception was that the use of the Acenture review (which bumped Lambeth back down to a Chief Supt) was in fact a dodge to avoid putting him back (see "18 Sep 2002: Rank manoeuvres afoot", here). Foy and Moore both got promoted after leaving Lambeth; Foy spend the intervening period as Steven's staff officer. Generally, it's common for people in senior positions in any organisation to have had both admin and operational experience, service functions like IT or Finance aside. I wasn't meaning that there was anything strange or sinister in them all ending up in the same unit, just worthy of note. Hopefully their experience in Lambeth will bring a particular perspective to their work.