Southern trains disrupted as weekend engineering works close lines

Southern rail passengers face disruption across much of this weekend as planned engineering works close lines on two routes serving London, with buses replacing trains and longer journeys expected on Saturday 12 and Sunday 13 September.

The Evening Standard reported that several lines have been closed, affecting Southern services into and out of the capital. Some services will not run at all, while others will be diverted, and journey times are expected to increase on the affected routes. Passengers have been advised to plan extra time for their journeys and to check before they travel.

Because the works are planned rather than the result of an unexpected failure, the closures were known in advance and were flagged on Saturday morning before the weekend services. That gives passengers some opportunity to re-plan, but the operator has still warned of materially longer journeys on both affected corridors.

There are two separate closures to plan around, each with its own replacement arrangement.

London Bridge to Streatham: all lines closed

The most significant closure affects the route between London Bridge and Streatham via Peckham Rye, where all lines are shut. Rail replacement buses will operate between the two stations, making additional stops at Herne Hill, Streatham Hill and Streatham Common, giving passengers along that corridor a calling-at-every-stop journey in place of a direct train.

Passengers travelling beyond Streatham are not left without rail options. Connecting train services are running between Streatham and East Croydon, allowing onward journeys toward Croydon and connections beyond. Even so, journey times will increase while replacement buses are in use, and the advice to allow extra time applies to both days of the weekend.

Southern services affected by weekend engineering works, Saturday 12 and Sunday 13 September 2026RouteStatusReplacement arrangementsLondon Bridge to Streatham via Peckham RyeAll lines closedRail replacement buses between the two stations, calling additionally at Herne Hill, Streatham Hill and Streatham CommonStreatham to East CroydonConnecting train services runningNo replacement buses reported on this sectionHorsham to BarnhamSevere route amendments and temporary service reductionsRail replacement buses operating between the two stations

Horsham to Barnham: amendments and fewer trains

The second affected route lies between Horsham and Barnham in West Sussex. Severe route amendments and temporary service reductions are in place on this section, with rail replacement buses operating between the two stations. Some journeys will not run in their usual form, and passengers will need to complete part of the trip by bus.

The two closures sit at opposite ends of the Southern network. One hits the inner London commuting corridor through Peckham Rye and Herne Hill; the other affects travel between Horsham and the Barnham area. The combination means disruption is not confined to one part of the network, although the report listed no other closed sections.

Advice to passengers

Passengers have been advised to plan extra time for their journeys and to check before they travel. That advice carries weight on both routes. On the London Bridge corridor, replacement buses call at additional stations and add time to every leg of the journey. On the Horsham to Barnham route, amended and reduced services may require re-planning, particularly for passengers who normally rely on a specific departure.

Anyone travelling with a tight connection elsewhere on the network should also build in a margin, since diverted services and bus legs can lengthen journeys even where trains still run.

What the report does not specify

The report did not detail the nature of the engineering works, which organisation is carrying them out, or whether services will return to normal on Monday morning. It also did not publish individual timetables for the amended Horsham to Barnham services. Passengers needing that level of detail should check live service information from the operator before setting out.

For this Saturday and Sunday, the practical picture for Southern passengers is clear. There are no trains between London Bridge and Streatham via Peckham Rye, buses replace trains between Horsham and Barnham, connecting trains run between Streatham and East Croydon, and journeys across both corridors will take longer than usual.