55 british rail standard class 7 locomotives otherwise known as britannia locomotives were constructed at the br crewe works between 1951 and 1954 they were designed by robert riddles and were intended to perform mixed traffic duties with each one being named after a scottish firth former star class locomotive or great briton no 70033 was the 34th of these locomotives to be built entering service in december 1952 and being named after the iconic author charles dickens in homage to his g