The route for the Bakerloo Line Extension will be ready next spring, Lewisham councillors will hear.

But funding for the scheme has yet to be found, with the Government yet to commit any money to it.

Lewisham Council is preparing its case to bring the Bakerloo Line into the borough with TfL and Southwark Council.

The core of the scheme would run through Elephant and Castle to Lewisham via Old Kent Road, incorporating a new interchange at New Cross Gate.

And after a public consultation this autumn, a “definitive outline” will be ready by next spring, a council report explains.

In 2017, Lewisham Council told TfL parts of the borough’s public transport network would not be able to meet rising demand in peak times if the extension did not go ahead.

It is hoped the business case will help secure the funding.

“While the current TfL Business Plan includes funding for the development of the plans for the scheme, the capital cost of delivering the Bakerloo Line extension has not yet been committed and funding remains the principal risk to making the line a reality,”  the report explains.

“While a settlement with national government will almost certainly be required to deliver the line, a local contribution from London will also be required in some form, as has been the case with other infrastructure projects such as Crossrail and the Northern Line extension to Battersea.”

There is also a “good business case” for extending the line beyond Lewisham and into Hayes, the report continued.

The definitive outline will include details such as the route alignment and locations of ventilation shafts, stabling and construction sites.

TfL has also earmarked Wearside Depot as a launch site for tunnel boring machines.

Once funding is found the first trains could be running on the line by 2029.