Members on Northern, Merseyrail, Greater Anglia, South Western Railways and Island Line have been instructed to walkout between 00:01 am and 23:59 pm on the 8th, 10th and 12th January 2018
Members on Southern will also strike from 00:01 am and 23:59 pm on the 8th January 2018.
The strikes come on top of two one-day walkouts planned for Greater Anglia on the 27th December and South Western Railway on New Year’s Eve.
South Western Railways is already putting in place contingency plans for the strike on 31st December, while Greater Anglia said it was aiming to resolve the dispute with talks and hoped to run a revised Christmas service on the 27th December.