The dire state of industrial relations at the country's biggest rail franchise has been revealed in figures showing that four out of five train drivers voted in favour of strikes before a ballot was suspended.

Aslef asked around 1,000 of its members at Southern Railway and the Gatwick Express if they wanted to take industrial action over claims of a breakdown in industrial relations.

The union suspended the ballot last week, but it is understood that four out of five drivers backed strikes before the voting was halted, with nine out of 10 supporting other forms of industrial action.

READ MORE: Southern Railway to reinstate 119 daily train services on September 5

It is understood Aslef took the decision after being threatened with legal action.

The union made no comment.

A Southern spokesman said: "We welcome the decision by Aslef to suspend their ballot notice over a 'breakdown in industrial relations' and that it will not take any further action in relation to the ballot notice, or the ballot.

"We are continuing to work with Aslef to address their concerns that led to the dispute."

READ MORE: Southern Railway to reinstate 119 daily train services on September 5

Southern and the Gatwick Express are part of the Govia Thameslink franchis