Elizabeth line: severe delays to Reading, only minor delays to Heathrow after Langley bridge strike

If you are heading to Heathrow or towards Reading today you still want a margin, but the picture improved over the morning. Severe delays on the Elizabeth line are now confined to the stretch outside London, and TfL has moved trains to the airport terminals down to minor delays.

Update, 09:35: what changed this morning?

At 09:20 London time TfL rewrote both the affected stretch and the cause. Severe delays remain between Reading and Hayes & Harlington. Between Hayes & Harlington and Paddington the status is minor delays — and the branch to the Heathrow terminals leaves the main line at Hayes & Harlington, so trains to the airport now carry severity 9 rather than the 6 they had at 07:48.

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The reason in TfL's data now reads "an earlier bridge strike at Langley". The first wording spoke of a track fault. The word "earlier" matters: the incident itself is over, and what remains is the knock-on delay as trains are worked through the remaining lines and recover the timetable.

What is a bridge strike, and why does it stop a line?

It is the British term for a vehicle — usually a lorry — hitting a railway bridge. Once that happens trains are held until engineers have inspected the structure: until the bridge is confirmed sound, nothing runs over it.

This is not a freak event but a standing British problem. Network Rail counts more than 2,000 bridge strikes a year, an average of five a day, and notes that the figure almost doubles in October — the annual peak. The most common hour for a strike is between 10am and 11am.

How serious is that on TfL's own scale?

The western stretch carries severity 6 — "Severe Delays", one step short of a part closure. The stretch into Paddington and the Heathrow trains carry severity 9, "Minor Delays". A normal service is 10.

One detail matters: TfL's data marks the disruption as RealTime, meaning it is unplanned. This is not weekend engineering work or a closure announced in advance.

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Which stations are in the severe-delay stretch?

TfL's affected-route data lists ten stations on the western route: Reading, Twyford, Maidenhead, Taplow, Burnham, Slough, Langley, Iver, West Drayton and Hayes & Harlington. Langley is itself an Elizabeth line station, between Slough and Iver.

Everything east of Hayes & Harlington — Southall, Hanwell, West Ealing, Ealing Broadway, Acton Main Line and Paddington — is running with minor delays.

How long will it last?

TfL reset the disruption window at 09:20, and it closes at 01:29 tonight. In plain terms, the operator has allowed for delays across the whole remaining day, not the next hour.

That is not a promise that trains will run late until midnight — the window will close earlier if the route is fully reopened. But it is the figure to plan your day around.

How do you get to Heathrow?

The Elizabeth line is running to Terminals 4 and 5, with minor delays, which on TfL's scale is ordinary background noise. Trains to Terminals 2 and 3 are running as well.

The Piccadilly line is normal at the time of publishing — severity 10, good service. It reaches every passenger terminal, but it is noticeably slower, so treat it as a fallback and add an hour.

What else is disrupted today?

London Tramlink: no service between Arena and Elmers End because of a track fault at Lebanon Road. TfL's wording says all day, while the disruption window is currently set to 12:22. Other tram routes are running normally.

The District line has minor delays between Earl's Court and Wimbledon because of train cancellations, severity 9. There is a good service on the rest of the line.

Where can you check live status?

TfL publishes live status for every line on its status page and on the Elizabeth line page. That is the same data this article is built from, and it updates in real time — as it did this morning at 09:20.

If a delay has cost you money or a missed connection, we have covered how refunds and compensation work separately: how Delay Repay and rail discounts work.