It seems that any visitation by the "persons in flat caps" to Brown may be stymied by the "buying off" of the Chief Whip, Geoff Hoon. It seems he is lined up to be a EU Comissioner upon the departure of Peter Mandelson. This may cool his adour in leading any Palace coup against Brown.
Presumably Hoon has either been told or assumes that his loyalty "will be appropriately rewarded."
Labour appears to be descending into a mutual back-scratchers' society.