This train is now approaching its final destination,

London Waterloo. However, it may be quicker to exit through the front of the train and walk along the tracks. This is because trains are not permitted to exceed 2 mph on this stretch of track.

South West Trains like to call it an emergency speed restriction. I (and undoubtedly many other commuters) prefer to call it 'you've had two days to fix the problem and still haven't managed it.'
And we still have another four days of it after today.