Calling the event “a happy development”, Buckingham Palace said “the organizers were told he could attend.”
The queen, who wore a sunlight yellow dress with a matching hat, was joined by her youngest son Prince Edward on an official visit. He was seen smiling as he walked around the station with a cane in his hand.
King made his first public appearance in a few weeks on Friday when he attended the Royal Windsor Horse Show, watching his favorite horsemen perform.
His public presence is being closely monitored to celebrate the 70th anniversary of the King on the British throne with a four-day Platinum Jubilee celebration on June 2-5.
Last week, he asked his son and heir to the throne, Prince Charles, to preside over the state inauguration of Parliament and address the Queen, highlighting the government’s legislative program.
Palace officials say he has been experiencing “episodic mobility problems” in recent months and is having difficulty moving.
