Over 70 members of the RMT rail workers’ union struck on the Heathrow Express in London on Thursday of last week.
The workers are fighting for better pay and conditions.
The union called off a previous strike on 5 September to allow its members to vote on a new pay offer, which was rejected by a 12-1 vote.
The workers called off a strike planned for Monday of this week.
They will meet this week to discuss their next steps.