Milly-Molly-Mandy Finds a Train

From Milly-Molly-Mandy Again (1948)

SUMMARY: A deserted train in a field proves a mystery to Milly-Molly-Mandy and Billy Blunt, but proves to belong to a roving tinker family.

Although Milly-Molly-Mandy has often appeared poor in the past, she is clearly better off than the thinker family (surname Thomas), who live in a train and have a "shabby" pram for their baby.