The royal household's staffing levels have remained largely static at around 430 people, during the past seven years, to allow it to maintain the Queen's programme.
However this contrasted with the public sector which had seen employee numbers cut during the same period, and yet the sector was still expected to increase efficiency with fewer workers.
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The Late Late Show host also allowed the singer to take the wheel in a Carpool Karaoke first.
The lender, which is the worst affected by the PPI mis-selling scandal, said it has also set aside £150m for other conduct issues.
Vodafone has been fined £4.6 million by the industry regulator for "serious and sustained" breaches of consumer protection rules.