The hatted gents have a big discussion before departure

Looking immaculate , and only just three months old , the third of the Southern's Diesels gets some attention from a group of Inspectors here at Waterloo doubtless at the head of one of the first of her Exeter Central duties upon which she was rostered from newly built , not at Ashford as been her two earlier sisters , but from Brighton Works .
10203 was more powerful than her two sisters , with a later design of the English Electric sixteen cylinder power unit which gave her 2000 horse power , 250 more than 10201 and 10202.
10203 's time on her home Region was short lived , however , and she was transferred to Camden and the London Midland Region in July of 1955 , joining her two sisters who had been transferred three months earlier , from where they worked on the West Coast main line before moving to Willesden Depot in the late ' fifties from where they spent much of their time on more local duties as well as working freights , especially during the winter months when train heating problems arose