Bank of England rate-setter Megan Greene said central banks should not assume that the Iran war's inflationary hit will be temporary and that policymakers cannot wait to see all the evidence before taking a stance on rates.
"This is our third negative supply shock in five years. We do have to worry about wage and price setting," Greene said at a Financial Times event on Monday.
"Traditionally you look through negative supply shocks, but I think when you have successive ones, actually that's outdated folklore and we shouldn't be looking through them anymore."
Greene voted with the majority to keep rates on hold in April but said an increase might be needed in upcoming meetings.
She noted that second-round effects from the energy price surge would take a year to become apparent.
Separately, MPC member Catherine Mann said she was awaiting data, including official April inflation figures, to assess upward risks to inflation.
Mann also told Reuters that uncertainty over Prime Minister Keir Starmer's future could weigh on economic growth.
