The Labour leader says staying a member could limit the government's powers to invest in industry.
The actress, Prince Harry's girlfriend, joins the opening ceremony as he hails injured service personnel.
Dame Kelly Holmes won gold in the 800m and 1,500m in Athens in 2004, but had suffered with injury.
A teenager is arrested after a "noxious substance" is sprayed near the Westfield shopping centre.
The painting of the Duke of Buckingham, found in Glasgow, was previously thought to be a later copy.