The new fleet has been hit with a raft of delays, but Mr Rotheram said he was the one to take the flak for the rolling stock not taking to the rails just yet. He said: “I have to start by saying we're losing (Cllr) Liam (Robinson), going to the city council as the leader of the Labour group, and hopefully as the leader of the council after May.
“That's a big loss for us. If people want to have a moan and blame anybody for stuff not happening, I'll hold my hands up, because I expected by now that we'd have trains on the tracks.
“They are running but we aren’t getting passengers on them. They have to do what's called fault free testing.
“They’ve got to run around 500 miles on each one, but because of everything that's happening, if we were to bring something in, and then literally stop them, and start them again and stop them it’s not going to work, I want it to be a big moment.”
Mr Rotheram said he wanted to welcome the trains with a “brass band” and see the new fleet as transformational for the whole area. During the testing runs, which many have seen on the Kirkby to Liverpool line, the new batteries are being put under rigorous exercise.
The Metro Mayor added: “They can go around 40 miles, so in other words, we can get anywhere in the city region. Imagine us taking over Northern services to Manchester.
“We could run them with our trains, and there's no additional cost of the infrastructure, they will have to buy new trains, but we’d be prepared to do that.” Passengers have been waiting a long time for the new stock, with a number of issues derailing plans for them to be online by the end of last year.
It has been six years since a deal was first struck to purchase the trains, but the Class 777s are yet to welcome commuters. Mr Rotheram said: “I don't think anybody foresaw a flood in the manufacturers.