A rail operator has signed a £100 million deal for new trains, adding more seats and capacity for passengers amid expectations of future growth.
c2c, which runs services between London's Fenchurch Street and Essex, said 60 Aventra carriages will be built at Bombardier's factory in Derby.
The new fleet will add almost 20% more seats and capacity from the summer of 2021, three years earlier than previously planned.
The delivery programme has been accelerated following the acquisition of c2c by Italian rail giant Trenitalia earlier this year.
The Rail, Maritime and Transport union (RMT) said the announcement was a victory for workers in Derby who had campaigned to secure a future for train building in the UK.
Each new train will operate in a fixed set of 10 carriages, and will include more than 900 seats, air-conditioning, Wi-Fi, plug sockets and three toilets.
Each new Aventra carriage will be five metres longer than c2c's current Class 357 Electrostars, and will provide capacity for 15% more passengers.
Trenitalia UK managing director Ernesto Sicilia said:
Richard Hunter, UK managing director of Bombardier Transportation, said:
Mick Cash, leader of the RMT, said: