Interviewed on Channel 4's A Week in Politics programme, he said: 'I believe we will see more services, more trains running. If the franchisee is going to succeed and make a good profit, he needs to attract a lot more passengers on his railway.
'His success depends on his ability to attract passengers, so he must run the safest railway, and one that's punctual.'
When asked for a promise that fares under privatisation would be lower, he said: 'I can promise that the fares situation will be better, but I cannot guarantee a level of fares.
'Where rail has got a high monopoly, like on the London commuter lines, we will continue to control maximum fares,' he said.