Ten of these carriages are already in service and the remaining 50 will come into use on Monday 12th December.
On the Retford to Sheffield route, they are increasing the number of seats on three peak time services - one train in the morning and one in the afternoon and one early evening - resulting in more than 300 extra seats on this route every weekday.
Mr Mann said: “This is long-waited good news for people who have to travel by train to Sheffield on a regular basis.”
“The daily misery of overcrowding and lack of capacity has been regular complaint by residents who have to squeeze into a train to get to work and back again.”
“This is a great Christmas gift for our Sheffield commuters!”