Queen Elizabeth II has attended this Tuesday by surprise an act in the London underground that has meant the official completion of the line that bears her name and that will open to the public next week, after several weeks in which she had seen to cancel agenda due to health problems.

Buckingham Palace has reported this "happy" surprise, which has led the monarch to visit Paddington Station with her son Edward. It is the first act outside of royal facilities since her funeral organized in memory of her late husband, Prince Philip, seven weeks ago.

The British Prime Minister, Boris Johnson, and the Mayor of London, Sadiq Khan, have also been present at this inauguration, which comes only a few weeks before the official acts for Elizabeth II's Diamond Jubilee are held.

The 96-year-old monarch had already participated in two public events in the last week, after Buckingham canceled part of her agenda due to Elizabeth II's mobility problems. In fact, the queen could not attend the opening of Parliament and she gave the reading of the Government speech for the first time to her eldest son, Prince Charles.