The briefcase is used to carry important statements to the House of Commons( Image: Getty Images) Today marks a historic moment in British history as Rachel Reeves, the first female Chancellor, is due to deliver the Budget. She will carry the iconic red Budget box which will contain the statements to be made. The role of Chancellor of the Exchequer dates back 800 years but the famous red briefcase was first used in 1853 by William Gladstone.In 1997 Labour's Gordon Brown commissioned a new briefc