The extension of a Tube line into Wandsworth is a “betrayal” of Lambeth residents, opposition councillors have said.

According to a report to be discussed at Lambeth Council’s cabinet meeting next week, councillors are preparing to rubber stamp plans for an expansion of the Northern line from Kennington to Battersea Power Station.

But the move by Transport for London (TfL) would rule out the possibility of an extension to Brixton or Streatham.

The report states: “The extension from the Kennington Loop to Battersea would preclude any alternative extension of the Northern line to areas such as Brixton and/or Streatham, although TfL has stated its opposition to any extension to Streatham on the basis of cost, no plausible external funding being available, and the ensuing overcrowding on the current Northern line.”

Liberal Democrat transport spokesman Councillor Alex Davies said: “This is a short-term plan ignoring the long-term regeneration needs.  

“Labour councillors in Lambeth should be backing this borough not Wandsworth.

“This is a massive betrayal of the people of Streatham and those in the south of the borough who desperately need an extension of the Tube.”