A fresh wave of strikes over pay and conditions kicked in today, with many people supporting the actions as they returned to work after the Christmas break.
Border Force staff at UK airports are beginning the second in a series of strikes which will run until New Year's Eve.
Rail disruption will also continue today (Wednesday) and tomorrow, with TSSA union members working for West Midlands Trains and Great Western Railways walking out.
Meanwhile driving examiners are on a rolling strike set to continue into January.
Despite the disruption caused by the various strikes, many people continue to support the workers.
One person tweeted: "Good news is, the Manchester to Nottingham train is running. Bad news is absolutely chokka and no trolley service. I still support the train strikers."
Another wrote: "Yesterday I was quite massively inconvenienced by the train strike. It was incredibly frustrating. This is a good thing! That's literally how strikes work. Full support and solidarity with the strikers!"
Border Force workers, including people in passport control, are striking over pay, jobs and working conditions. One thousand Public and Commercial Services Union (PCS) are taking part in the walk out.
Civil servants and military personnel are covering the strikers at Gatwick, Heathrow, Manchester, Birmingham, Cardiff and Glasgow airports, plus the Port of Newhaven in East Sussex.
Border force workers went on strike between December 23-26, but the disruption was minimal as passenger numbers were relatively low. However, union leaders have warned walk outs could carry on for six months if the government won't negotiate.
The TSSA strike on Great Western Railway and West Midlands Trains is part of a series of rolling strikes at various operators that began on December 23.
The TSSA’s organising director Nadine Rae told BBC Radio 4’s Today programme: “It’s the government that needs to shift this situation, and we really want them to. We know the disruption is frustrating for people.
“Things have not changed since before Christmas in terms of a deal; it’s still in the government’s gift to ensure the employers can freely negotiate and can put together a deal that’s acceptable to our members and affordable to employers."
Meanwhile examiners at 71 driving test centres in the Midlands and eastern England are striking for five days from Wednesday, as the PCS union calls for a 10% pay rise for striking staff. It also wants improved job security and pension and protection of existing redundancy terms.
PCS general secretary Mark Serwotka said: “Our members have been offered a pay rise of just 2% at a time when the cost-of-living crisis is above 10%.
“We know our action will cause widespread disruption and inconvenience to people in Eastern England and the Midlands – hundreds of driving tests have already been cancelled in other parts of the country – but the government is to blame. These strikes could be called off tomorrow if Rishi Sunak and Jeremy Hunt put some money on the table."
