I’ve only ever heard 800 being referred to as “eight hundred”.Then we also have media numpties referring to 'the Third Commando Brigade' (NO - THREE) or 'Forty Five' (NO - FOUR FIVE) Commando, or (in the old days) 'Eight hundred (th for added annoyance) naval air squadron' - (NO - EIGHT ZERO ZERO).
Sometimes people get so fed up they write it out longhand - FOUR FIVE CDO or EIGHT ZERO NINE NAS.
..and breathe...
(Or more accurately - those WAFU fûckers loafing off/dragging the chains above our heads…)