Another batch of strike action is set to disrupt the DLR from tomorrow, with the four-day walkout also coinciding with the London Marathon.
So here's what you need to know about what's likely to be affected and when.
When is the walkout happening?
A walkout has been called by the RMT for KeolisAmey Docklands members from 4am on Friday 20 April to 4am on Tuesday 24 April.
What's the strike about?
The strike is due to a row over a number of workplace issues between the RMT and KeolisAmey Docklands, spanning what the union has called payroll and taxation failures to "attacks on rostering agreements", it said would impede work/life balance.
Abdellah Chajai, managing director of KeolisAmey Docklands, has called the action "totally unnecessary" and the firm remained committed to "meaningful and reasonable discussion with the union to resolve the issues".
So it doesn't actually involve TfL?
The row concerns KeolisAmey Docklands, which operates the DLR on behalf of TfL, hence why a walkout will still affect services.
Wasn't there a DLR strike the other week?
Yep, a 48-hour one had previously been called over the dispute, with TfL warning then of wider disruption.
Will anything run?
Plans are being developed with the aim of operating a limited service over the four days, which coincide with the London Marathon on Sunday 22 April.
Limited services will be prioritised to enable participants in the London Marathon to travel to ExCeL to register ahead of the event, and for runners and their supporters to reach the race line in Greenwich and on the Isle of Dogs on Sunday.
Customers are advised to check the TfL website at tfl.gov.uk/DLR-strike for the latest information and to plan ahead, looking at alternative options for their journeys.
Isn't the London Marathon during the walkout?
Yep. It's more of a concern as the London Marathon is being held on Sunday 22 April - slap bang in the middle of the strike. That winds its way around the DLR area, so the strike could prove disruptive to those taking part in, or watching, the event.
TfL has warned that thousands of people could be disrupted due to the walkout, with around 40,000 people alone taking part in the marathon and many others gathering to watch.
What else is likely to be affected?
The DLR, London Underground and London Overground usually lay on extra services on the race day as there are a number of road closures (more on those here), so it's likely the Underground and Overground will be busier as a result.
TfL has warned the Jubilee, Central, District and Hammersmith & City Lines in east London are expected to be busier than usual and stations including Canary Wharf, Canada Water, London Bridge, Canning Town, Bank and Stratford may be "exceptionally busy".
Extra bus services will be deployed along the DLR network over the four days, while all other TfL services will be operating as normal - though there will be road closures around the London Marathon route from Sunday morning.
Any hope of it being called off?
Talks have been ongoing, so progress could be on the cards - stay tuned for an update on whether they result in a resolution in time for the four-day strike to be called off.