Train drivers at Southern have again rejected a deal for a Driver Only Operation.
The RMT has released a statement following ASLEF members' decision.
This ballot was entirely a matter for ASLEF and its members. However, the result reflects the continuing and deep seated concern amongst drivers and the wider workforce over the extension of DOO and the safety impact on passenger services.
Southern Rail cannot jam their heads in the sand any longer. We are in talks with the company tomorrow and we now expect the fundamental issues at the heart of our guards' and drivers' disputes to be taken seriously.
There's an easy solution to this long running industrial dispute and Southern Rail need to join with the unions in reaching an agreement that protects passengers and which recognises the safety critical issues our members have been fighting for over the past year."
More top news
Hundreds gathered for a special memorial service in honour of three people killed in an horrific crash on the M4.
Tuesday Evening's weather for the Meridian region
The 52-year-old was found guilty of killing nine-year-olds Nicola Fellows and Karen Hadaway in a woodland den in Brighton in 1986.