More seats on Chiltern Railways rush-hour trains
An extra 1,080 seats a week have been added to Chiltern Railways morning peak services from Banbury to London.
The train firm introduced a new faster mainline service from Birmingham Moor Street to London Marylebone last year.
It said passenger numbers had since increased from the Oxfordshire station, the West Midlands and Warwickshire.
The 06:19 service from Birmingham will get one extra carriage, 72 seats, and the 08:16 from Banbury will get two extra carriages, another 144 seats.
Jennifer Payne, customer service director, said: "Banbury is a key Chiltern station at the heart of our network.
"Since the launch of Mainline just 12 months ago, there has been a significant increase in the numbers of passengers travelling on our key morning peak services.
"We're delighted to be able to offer more seats from Banbury as we continue to improve our service, to ensure that our passengers have the best service possible."