Original sentence: The constituency was abolished at the 1997 general election with one third going to the new Croydon North seat (the Thornton Heath, Upper Norwood and South Norwood wards) and the rest (the wards of Woodside, Rylands, Addiscombe, Ashburton and Monks Orchard becoming part of an expanded Croydon Central
Edited sentence: The constituency was abolished at the 1997 general election with one third going to the new Croydon North seat (the Thornton Heath, Upper Norwood and South Norwood wards) and the rest (the wards of Woodside, Rylands, Addiscombe, Ashburton and Monks Orchard) becoming part of an expanded Croydon Central