To count as "senior" - the word used in the Diamond memo - that would have to mean a top official such as Sir Nicholas Macpherson, the Permanent Secretary at the Treasury.
BBC: Barclays Banks - A Whitehall whodunit
2.
Experience a galaxy of amenities including a private patio, 300-thread-count linens and an oversized marble tub with a flat-screen TV at the AAA four diamond award-winner.