What are the motifs in London Transports by Maeve Binchy?

Race and racial stereotyping is found in several stories in Maeve Binchy's London Transport. By the 1970s, parts of London have attracted substantial immigrant and tourist populations. Sophie in "Marble Arch" runs a store-front, selling leather goods. She rather resents being a minority speaker of English in her own neighborhood but recognizes that wealthy foreigners, particularly rich Arabs, are her best customers. She wants not to be a racist but to consider everyone walking on two feet human.