Foreign leaders should use escort buses to get to the funeral, according to the UK.
It said the president could use his own car for his security.
The UK government made its rules seem like guidance.
The UK does not advise foreign leaders to travel by bus to the funeral of Queen Elizabeth II.
According to a report on Sunday, foreign leaders were asked to get to the UK by commercial flights and then taken to the funeral by shuttle buses because of tight security.
According to The Times of London, Biden will be able to travel through London in his armored car.
UK government sources told The Times that Biden would be allowed to take his car to the funeral for security reasons.
The travel requests were not a rule according to a spokesman for the UK Prime Minister.
They said that the arrangements for leaders and how they travel will be different.
Security risks will affect arrangements for different leaders.
The prime minister's office said "yes" when asked if Biden could choose his own mode of transportation.
The Times reported that the French President is likely to take his own vehicle for security reasons.
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