Mmm if she was, I hazard she'd have requested a longer cord for starters!
Infact I recall watching a TV programme one year about how Buckingham Palace is maintained. I recall they used a selection of old Hoover upright vacuums and the entire sole plate was covered over with a metal grid, just so that the brushes wouldn't remove anything too harshly from the delicate rugs.
Here's a fun spoof video of our Queen cleaning (but sadly not with any machine!).
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