Vincent Auriol arrives in UK, rides in carriage with King George VI in London fog

The transcript describes a ceremonial event featuring the Guard of Honor, a large crowd, and a royal procession including Madame Mario, the Queen, Princess Elizabeth, and the Duchess of Gloucester. The weather plays a significant role, with the sun struggling to shine. The event also touches on London's portrayal abroad.

What was the condition of the sun during the event?

How is London described in the context of the event?