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The LO units only ever use the 3rd rail, they don’t have other central pick up shoes, so when running over LU tracks it’s only the tube stock that contacts the 4th rail, which is operated at 0 volts to put the third rail at 660 Volts for mainline trains. Exactly the same as on the Wimbledon and...

It would be bonded every so often to the running rails.

If all the fast services run with the same calls and to the same overall timings, which one do you name? :D

There aren‘t separate returns in DC areas. But if there were, they would have to be a very large cross sectional area to deal with the expected current without significant voltage drop. So it makes much more sense to use the rails.

There was a similar question raised in May, it did include the point that speeds might well be different in either direction: https://www.railforums.co.uk/threads/why-is-one-longish-stretch-of-straight-track-different-speeds-on-different-lines.286950/

Oh dear, what about the forum members who claim not to understand the 24 hour clock system? Didn't a thread a few months ago include a request to revert to am and pm in timetables? o_O

Nevertheless they are big inductors, and they will be carrying thousands of amps at times. There’s a decent photo in this thread: https://www.railforums.co.uk/threads/what-is-this-track-equipment.137716/#post-2767097

Well that’s basically what the RAIB report concluded had happened. It states that during initial site ground investigations they had hit the tunnel at 14m depth, and thought it was a manmade feature, but they then discounted it being a tube tunnel because there was nothing on the tube map.

The required fault free running distance is specific to individual contracts, it’s possibly unwise to generalise. I’ve seen anywhere between 500 and 5000 miles mentioned in earlier threads about a variety of stock, and it’s often been said that the first units accepted will have to do far more...

This thread has come round late this year, the 2023 and 2024 versions were both in June… :D 24 https://www.railforums.co.uk/threads/trivia-longest-dwell-time-in-the-middle-of-a-continuous-service.249714/ 23 https://www.railforums.co.uk/threads/longest-intermediate-dwell-time.268797/ 20...

And some of the listed improvements have not been started, as has been pointed out many times in the various ECML timetable threads. I think far too much is being read into a wiki article based on reporting of a total set of improvements that has never been authorised.

Because the original stickers (back when there were a only a minimal number of sockets), have never been updated since the trains were new, and all the extra sockets fitted in the work done a few years ago were given the same stickers. (Indeed, are they a standard Siemens fit on other Desiro UK...

There’s been a couple of recent threads on related topics, to save probable duplication :D … Train seatbelts: https://www.railforums.co.uk/threads/why-do-trains-not-have-seat-belts-overheard-question.292651/ Train standing capacity...

In the general case, station operators just cover logical geographic areas, and in most cases have been left as they were in the 1990s, I don’t believe there’s a routine process of auditing calls/capacity and changing operator if numbers of vehicles slightly changes. There have been a few...

There are hand rails but they are almost all vertical, the old sets had more horizontal rails running along the car at a high level. It was the latter that aided onboard gymnastic displays…

Chathill’s down side station building doesn’t make it look like a wayside halt at all. It’s one of quite a few on the line through Northumberland that was built on the grand scale.

Kings Cross surely? Using the then spare bores of both of the tunnels?

The last serious proposals, in the 2015 Wessex route study, did not include either 8 tracking or removal of the flyover. They did propose a few changes to track use (eg changing the Windsor reversible into the Up Windsor), and that would bring Queenstown Road P1 back into normal use.

RAIB don’t ever assign blame, it’s stated clearly in the preamble to their reports. They state the facts, then it is for ORR and the courts to deal with the follow up activities.

History now really. It was about extending a majority of inner suburban services from 8 car to 10 car, either by extending the original 458s to 5 car using ex 460 vehicles, or by running combinations of 2x455 and a 456. It never achieved 10 car on all services all day, as there were not enough...