Our December timetable begins on Sunday 13 December and will increase peak commuting capacity on some of our busiest routes, delivering more than 4,000 extra seats to and from London Waterloo.

The changes form part of our Improving your Railway plan to improve performance across the network. Using the twice-yearly timetable changes and additional capacity from our Arterio fleet, we are making enhancements based on customer feedback and adding capacity where it is needed the most.

We are also making targeted changes to improve reliability and provide better connections that support journeys to schools and other onward destinations.

To download our December timetable, click here, or read on to find out more about the changes.

What are the changes?

Additional services

On weekdays, extra peak time services will offer more seats and journey opportunities for customers travelling on our Portsmouth via Guildford and Southampton/Bournemouth to London Waterloo routes. 

Increased capacity

The December timetable adds peak suburban capacity where it is needed most by building on the introduction of our 60 new, 10-car Arterio trains.

Arterio is transforming every single journey on our suburban network, covering 90% of all our suburban services to increase suburban capacity by 33%. 

Improved reliability

Targeted changes to train timings will improve reliability along the busy corridor between London Waterloo and Woking. These build on wider investments to our track and signalling systems and our improvements to tackle common causes of delays and reduce disruption across the network.

Better connections

Minor changes to timings and calling patterns, in response to customer feedback, will provide better connectivity across our network and with other operators’ services.

The 0744 service from Alton to London Waterloo will make an additional stop at Weybridge at 0833, providing better connections for school students in the morning peak. 

Key timetable additions and changes by route: 

Further timetable changes apply from Sunday 13 December. Customers should check the new timetables here.

Looking ahead

We will also launch a timetable consultation in late 2026, which will give customers the opportunity to share their views on long-term timetable improvements.

This will include options around timings, frequencies and stopping patterns, alongside the regular six-monthly timetable updates. 

The changes form part of South Western’s Improving your Railway plan to improve performance across the network. For more information click here.