120,000 passengers on London trains are forced to spend the rush hour commute to work standing- a fifth of the 545,000 passengers coming through the capital every morning.
New figures reveal 60 per cent of peak train services had passengers standing and 24 per cent were over capacity.
Routes into Blackfriars, Paddington and Fenchurch street suffered the most overcrowding, while Blackfriars and Fenchurch Street also became busier than the year before.
The capital has eight out of 10 of the countries most overcrowded routes with the 16:46 Euston to Crewe service taking the crown as the UK’s most overcrowded.
Overcrowding on the morning commute into London fell slightly in 2013 compared to the year before, however evening routes became increasingly overcrowded.
First Great Western, the operator of services from the West Country into Paddington, was the most overcrowded of all train companies with routes into the capital. This was followed by London Midland and c2c.
The data from the DfT was collected on a typical weekday between September and Decemeber. However, it warned the data identifying the top 10 busiest routes was just a "one-off snapshot".
Chart note: Passengers in excess of capacity (PiXC) is the main measure of crowding. It shows the proportion of standard class passengers that are above the capacity on their service at its busiest point. The numbers of PiXC on each service are added together and shown as a percentage of the total number of passengers on all peak services.