most of the steam locomotives are based on british mainline prototypes built to 1/8 scale. all four pre-nationalisation companies are represented and locos from both pre-grouping and br 'standard' eras are present, as well as some freelance types. the oldest, a north eastern railway class 'r1' (lner d19) 4-4-0 was built in 1913 and is still in working order. the smallest is a midge 0-4-0t while the largest are the 4-6-2 'pacifics',the oldest being a freelance version built by louis shaw in 1927 and given the name 'eureka' by sir john samuel in 1947 as he had found, in his opinion, the ideal engine for his railway. other pacifics represent prototypes from the lms, lner and southern companies, as well as british railways. engines of 2-6-0 and 4-6-0 wheel arrangement feature as do 'atlantics' from both the gnr and lbscr alongside 0-8-0, 2-8-0 and 2-10-0 goods engines. a comprehensive list follows.