Jubilee Line Tube drivers ballot over strike action
Tube drivers on the Jubilee Line, working out of the Stratford and Greenwich depots, are to be balloted for industrial action.
The RMT claimed the reasons for the dispute include "bullying of staff" and a "decline" of working conditions.
Transport for London (TfL) said it would meet with the the RMT and Aslef later this week to discuss the issues in greater detail.
"We are keen to understand their concerns," TfL said.
In a letter to London Underground setting out the reasons for the dispute, RMT has highlighted:
•The "unfair and disproportionate" treatment of drivers in disciplinary meetings
•Many facilities on the Jubilee line being in a "very poor" and in some cases a "disgusting" state
•The "removal and threatened removal" of some benefits
•A "severe lack of support" from managers for their staff
The Aslef union is also balloting over strike action.
RMT General Secretary Bob Crow said: "RMT will not sit back and allow the wilful misuse of procedures on any part of the tube network as a means of bullying and intimidating our members."
Jubilee Line general manager John Doyle said: "The unions have informed us that they are in dispute with us over what they perceive as a breakdown in industrial relations.
"We are keen to understand their concerns and so will be meeting with the unions later this week to discuss these issues in greater detail."