Arterio

We’re introducing Arterio, our new fleet of 90 trains that will transform every single journey on our suburban network.

Through Waterloo, the beating heart of our network, SWR’s Arterio trains will carry customers along the arteries of our suburban network to the capital – to work, to school, to restaurants, shops, bars, sporting events and theatres – and home again.

We’ve invested a massive £1 billion to provide more capacity, quicker journey times and better reliability and punctuality for our customers.

The full fleet of 90 trains will serve 98 stations in and around South West London and each ten-car train can carry over 50% more customers than the trains they are replacing.

Our new Arterio trains are here. In September 2025, we hit an exciting milestone and now have 20 Arterio trains regularly operating on our routes between London Waterloo and Dorking, Guildford, Hampton Court, Reading, Shepperton and Windsor.

Along these routes, Arterios will call at our busiest stations including Ascot, Earlsfield, Epsom, Feltham, Hounslow, Kingston, Raynes Park, Richmond, Staines, Surbiton, Twickenham and Wimbledon.

We’re rolling out Arterio trains to more stations over the coming months, moving us closer to our goal of transforming every journey across our suburban network.

The map below shows the routes that Arterio will serve:

What to expect

The Arterio fleet

The 750-carriage, British-built fleet was manufactured by Alstom in Derby using strong, but lightweight materials, such as aluminium for the body shell.

Arterios are far more technologically advanced than the older trains they are replacing and have room for many more customers, with each ten-car train providing over 50% more capacity.

They are designed to improve comfort and reliability for the hundreds of thousands of customers that use our suburban routes to some of the busiest stations in London.

Features

Accessible - Travel made easier – for everyone

• Every five-car train includes two dedicated wheelchair spaces, with double the capacity on 10-car trains
• Our 10-car trains feature two fully accessible Controlled Emission Toilets
• Seating in other areas of the trains can be tipped up to accommodate prams or larger luggage, so customers can travel more comfortably, whatever they’re carrying.

Sustainable - On a journey to a better future

• Our Controlled Emission Toilets biologically and thermally treat waste, producing water clean enough to meet bathing water standards.
• Regenerative braking cuts energy usage by up to 30%, feeding electricity back into the conductor rail, making Arterio more sustainable than the older trains serving the suburban network.
• With six cycle rack spaces on board every 10-car train, Arterio supports seamless and sustainable travel options.

Performance and experience - Making your journey better

• Our £1bn Arterio fleet improves customer comfort and connectivity, with Wi-Fi, charging points at every seat, real time updates, accessible toilets and air conditioning.
• Faster acceleration and braking and wider doors mean quicker boarding and shorter stops, getting customers where they need to be, faster.
• Each ten-car train can carry over 50% more customers than the eight-car 455s they replace, and we’re rolling them out where commuters need them most.