PCS General Secretary Mark Serowtka said: “Our hardworking members are fed up and angry with the way they’re being treated by a Government that takes them for granted.
“Since our programme of sustained action started, thousands of new members have joined PCS, determined to win this dispute and secure for themselves a pay rise to help them through the cost of living crisis and beyond.
“The Government can resolve this dispute tomorrow if it puts money on the table. Until it does, the action will escalate.”
Tourists travelling on February 1 and 2 should be prepared to face disruption when they return to the UK.