The Queen and the Duke of Edinburgh are set to arrive in Aberfan on their first engagement of the day.
The Queen made her fourth trip to the village of Aberfan, before greeting crowds in Ebbw Vale and at Glanusk Park.
The Queen and the Duke of Edinburgh will spend a second day in Wales as part of the Diamond Jubilee celebrations.
The Queen has begun her two day tour of Wales. Her Majesty attended a service of thanksgiving before meeting Wales' Grand Slam winning team