New DLR trains will not be introduced until the end of this year, 12 months after they were originally supposed to be in operation.
Transport for London (TfL) has blamed the delay in introducing 54 new trains for the DLR, initially scheduled for the end of last year, on testing and signalling issues.
But a TfL report released last month has revealed that the testing of the new trains has started again, and that they could enter service by the end of this year.
More work is also planned this year to try and address the speed restrictions put in place along the network in response to technical issues with its signalling system.
The estimated final cost of the project stands at £942 million, although TfL has said it expects this to rise before the trains are finally delivered.
The report also confirms that more than 40 of the new trains have now been built.
Transport bosses say that the new walk-through, air-conditioned trains will improve reliability, provide greater capacity, and offer an improved customer experience for DLR passengers.
The new trains will replace an existing fleet of 32, which is more than 30 years old, allowing for more frequent services across the network.
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