Train passengers returning to work after the summer holidays are facing travel disruption today because of a strike in the long-running dispute over guards on trains.
The strike by members of the Rail, Maritime and Transport union on South Western Railway has been going on since Friday - and will hit services until Tuesday morning.
Some trains are cancelled, others replaced with buses and fewer services are running into London Waterloo, the country's busiest station.
It's the 35th strike on South Western Rail over the past two years.
During any strike action, while services are likely be busier than usual, we do everything we can to keep customers moving. We will be running around 60% of our normal timetabled service today and have rail replacement services and ticket acceptance in place on other transport providers where possible.
In the latest phase of strike action on South Western Railway over passenger safety and the critical role of the guard at the train/platform interface our members are standing united and determined to secure a genuine settlement. The resilience of RMT members throughout this long, hard fight to put safety on the railway first is a credit to the trade union movement.
SWR said it planned to run just over half its normal timetabled service over the course of the strikes and will try and introduce extra services wherever possible.