Fresh strikes at the beginning of November have been announced by the RMT union.
The walkouts are part of an ongoing dispute about pay and working conditions.
Commuters will see disruption on the 3, 5 and 7 November.
RMT general secretary Mick Lynch accused Network Rail of “dishonesty” in negotiations, meanwhile Network Rail says it had a two year, 8% pay increase deal “on the table ready”