Simplify the following text for a Grade 12 native English-speaking person.
Original: This resulted in formal , planned developments such as King Street , Portland Street , Saint Marnock Street , and latterly John Finnie Street ; the latter often suggested as one of the finest Victorian planned streets in Scotland .
Simplified: This resulted in formal , planned developments such as King Street , Portland Street , Saint Marnock Street and latterly John Finnie Street ; the last often suggested as one of the finest Victorian planned streets in Scotland .