In London and the south-east, train traffic is likely to be interrupted due to the potentially hottest temperatures that have ever occurred, as speed limits apply to prevent the rails from buckling under extreme heat.
Restrictions and alternative schedules are expected to be introduced at lunchtime, as temperatures are highest. So do not assume that you're okay on the way home just because you started working this morning. If you have problems, we recommend that you go to the nearest beer garden or rooftop bar and sit in rush hour?
The changes vary from train operator to train. However, we know the following (this is likely to change during the afternoon / evening, depending on how the situation develops):
The subway and TfL services
Despite the oppressive heat in the underground, no changes are to be expected Subway services - though we would not be surprised if there were some delays because people would faint on board tube trucks. Drink your water, people. This subway map shows which lines are air conditioned.
London Overground has serious problems, with no service between Edmonton Green and Cheshunt all day, and a reduced service elsewhere on the network. Check the TfL website for updates.
TfL Rail Due to the speed limits, a reduced service is operated with most of the error is expected between 16 and 19.30. Keep an eye on the TfL website for more updates.
Trips across the Southeastern network may change at lunchtime. Southeastern does not recommend traveling, if possible. The online travel planner (NOT the timetables) on the Southeastern website seem to have been updated with the changes. So enter your usual trip to see if the trip is likely to be normal. It's worth keeping an eye on that Southeast Twitter feed for the latest updates.
Southern warns of changes from 10 clock and advised again from unnecessary travel. As with Southeastern, travel planners on the Southern website should now be updated with today's changes. Check this before you drive to the station. For the latest news, please visit Southern's Twitter feed Here,
Speed limits also apply to Thameslink, which offers a reduced service. Details were not announced. Check the Thameslink website and Twitter before you travel.
At the time of writing, the South Western Railway has not announced any specific changes, although it does include some tips for traveling in hot weather. However, Waterloo station - the main London terminus in the Southwest - is notorious for heat-damaged track noise, so we would not be surprised if something went wrong. Keep an eye on the website Twitter and customer service Twitter,
Great Western Railway
Between Paddington, Didcot Parkway and Banbury, speed restrictions apply from 12:00 to 20:00. Since these trains take longer to reach their destination, later delays are possible. And trains between London and South Wales operate only hourly instead of half-hourly. Check the Great Western Railway website and route planner, and follow on Twitter for updates.
Due to these speed restrictions, Chiltern warns of minor delays between 12:00 and 20:00. During this time, no trains will stop at Little Kimble or Monks Risborough. Check the website and Twitter for the latest updates.
Virgin Trains West Coast
The line between Euston and Rugby can be changed and canceled between 12:00 and 20:00 on the west coast of Virgin Trains. Keep an eye on the website and Twitter to see if this changes.
London Northwestern Railway
The main routes of the London Northwestern Railway are, according to Euston and Rugby, as well as Watford Junction and St Albans Twitter, Stay up to date or check the London Northwestern Railway website for your trip.
LNER passengers are warned against travel unless essential. Speed limits exist between King's Cross and Peterborough, with a delay of up to 35 minutes. Elsewhere in the LNER network there is a reduced timetable. If you have a ticket for today, but have decided against traveling on (wise move), this is instead for Friday, Saturday or Sunday. Updates on the LNER website and Twitter,
Greater Anglia is another operator that discourages customers from traveling unless it is absolutely necessary (the heading "not traveling" on its website is particularly threatening). Specific details about the services involved are scarce, and the company reports that our usual schedule is unable to work. Check your trip before you travel, and as always, Twitter is your friend.
C2C Rail is also affected by the speed limits, although no specific details have yet been released. It means there will be cancellations posted on the website and social media,
All operators expect the normal service to resume on Friday. However, check this before you travel as train wagons may be outsourced on a Thursday mishap and rush hour on Friday.
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