Sign Our Petition For Four Trains Per Hour On The Coryton Line

Why does the Coryton Line need four trains per hour?

In other parts of our city and South Wales, passengers already enjoy a “turn up and go” service with more frequent trains. Llandaf station has six trains per hour to Cardiff Central. Pontypridd has eight.

If the South Wales Metro is to serve all of us, it should not be easier to access Cardiff from the Valleys than our city’s northern suburbs.

I believe four trains per hour is a fair and necessary expectation for passengers wanting to enjoy a modern South Wales Metro service and having a viable alternative to taking the car.

How can we achieve it?

I want to see more rail investment come to Cardiff North so we can finally fulfil the potential of the Coryton Line. With a passing loop on the track and upgrades to Cardiff West Junction, we can improve the track capacity so it can run four trains per hour.

Our UK Labour Government knows that Welsh railways have been historically underfunded and Welsh passengers are paying the price. That is why we are investing at least £445 million to right this wrong — which should, in turn, make new projects possible and unlock further funds.

Scroll up on this page to add your name to our petition.

Letter to Ken Skates MS, Cabinet Secretary for Transport, 4th December 2025

Dear Ken,

As you know, I have been campaigning for a rail service that my constituents in Cardiff North can rely on. Today, I would like to ask the Welsh Government again to commit to doubling the frequency of trains on the Coryton Line from two to four trains per hour.

At the beginning of this year, three Coryton Line stations — Birchgrove, Whitchurch and Rhiwbina — were ranked among the least reliable in the country. Since then, I am pleased to say there has been a marked improvement, with more trains arriving on time and far fewer cancellations. Our '#NextStop campaign in Cardiff North has achieved some major wins like later trains, and a Sunday service starting on 14th December — just in time for Christmas.

Despite serving thousands of residents, many of whom commute to the city centre for work, the Coryton Line’s potential is being squashed by running just two trains per hour, far less than the six at Llandaf or eight at Pontypridd. I believe that doubling this to four trains per hour — one every 15 minutes — is a fair and necessary expectation for passengers enjoying a modern South Wales Metro service.

Our UK Labour Government knows that, for too long, Welsh passengers have paid the price for the historic underfunding of Welsh railways by previous governments. That is why we have committed at least £445 million to right this wrong — a landmark investment which should in turn unlock further funding and facilitate new projects. As the Welsh Government’s Cabinet Secretary for Transport, I urge you to seize this opportunity and ringfence the small amount of investment needed to double service frequency on the Coryton Line to four trains per hour.

Some work is needed to make this possible — allocating more Metro trains to the Coryton Line, creating a passing loop for the track, and upgrading Cardiff West Junction relieve the congestion at Cardiff Queen Street. This is however the only way residents can enjoy a “turn up and go” service which means they never have to wait more than 15 minutes for a train to arrive. Without it, thousands of my constituents face the prospect of an inferior service while transformative progress is made elsewhere. If the South Wales Metro is to serve all of us, it should not be easier to access Cardiff from the Valleys than our city’s northern suburbs.

Whether it is the state-of-the-art £100 million depot in Taff’s Well or £1 bus tickets for young people, I commend the Welsh Labour Government’s commitment to connecting communities. I hope you agree that with four trains per hour on the Coryton Line, we can realise the potential of the South Wales Metro in our capital city and give thousands of my constituents a viable and reliable alternative to taking the car. I will not stop pushing for a rail service that residents can rely on.

I have sent a copy of this letter to James Price, CEO of Transport for Wales.

I look forward to hearing from you.

Kind regards

Anna McMorrin MP