LONDON — Questions about the close links between banking regulators and the financial institutions they oversee will come into focus on Monday, when a top official at Britain’s central bank appears before a parliamentary committee here looking into the manipulation of global interest rates.

Paul Tucker, a deputy governor at the Bank of England, will give evidence on whether senior government officials put pressure on Barclays to lower its submissions to the London interbank offered rate, or Libor. Barclays agreed in late June to pay some $450 million to settle accusations from US and British authorities that its traders and senior executives had manipulated the rate, which underpins trillions of dollars of corporate loans, home mortgages, and derivatives around the world.