Celebrations are taking place around the UK on the day the Queen turns 90.<br />Crowds of cheering people lined the streets in Windsor as the monarch took part in a walkabout, and royal gun salutes have been fired from each of the UK's capital cities.<br />The Queen, who was accompanied by the Duke of Edinburgh during her tour in Windsor, was presented with a birthday cake at the Guildhall by the Great British Bake Off champion Nadiya Hussain, who had created an orange drizzle cake with a butter cream and marmalade filling.
