The National Portrait Gallery off Trafalgar Square is running a story competition at the moment called "Imagined Lives". The pictures you can see (and ten others) were originally attributed to be of known people, but it has been discovered that we don't know who they are. For example, the lady was thought to be Mary Queen of Scots...but isn't. Your task, should you wish to accept it, is to create a story of up to 300 words to accompany one of the portraits. It's running till 22nd July, so you have plenty of time, find out more here.