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By Zoe Conway
Employment correspondent
Saturday sees yet another day of disruption for rail passengers, with workers in the RMT union continuing their latest 48-hour walkout.
The advice is once again to avoid taking trains if possible, with only one in five services expected to run.
Strike action from driving examiners also continues in some parts of the country.
You can read more or watch this report about why people are taking strike action, and below you can find information on how it could affect you.
Train strikes across England, Scotland and Wales
Workers from the UK's largest rail union, the RMT, are striking on Saturday. It's the fourth day of action from the union this week after walkouts on Tuesday, Wednesday and Friday.
Together with the strike by train drivers' union Aslef on Thursday, it means rail services have now been disrupted for five days in a row.
Saturday's action means some areas will, once again, have no trains at all.
Services that do operate, will typically run between 07:30 and 18:30 GMT on the days of the strike.
It you must travel by rail:
Sunday is the only strike-free day on the railways this week, but there may still be some knock-on disruption to services. That's because carriages, engines and staff may not be in the right place at the start of the day.
Rail services are not expected to get back to normal until Monday 9 January.
As things stand there are no more major rail strikes scheduled, although both the RMT and Aslef unions have warned there could be further action.
The unions are expected to meet rail employers and the rail minister on Monday to try to find a way forward.
Upcoming strike action
THU 29 DEC
Rail disruption continues
- Staff at West Midlands Trains (WMT) and Great Western Railway (GWR) are on strike until midday
- This includes staff working in ticket offices, station management and guards
Border Force strikes
- Some Border Force staff are striking in England, Wales and Scotland meaning delays are likely for people arriving in the UK
- Birmingham, Cardiff, Gatwick, Glasgow, Heathrow and Manchester airports, and the port of Newhaven, will be affected
Driving test centre strikes
- Some driving examiners are on strike in the East Midlands, West Midlands, east of England and parts of London
- The industrial action will not affect theory tests but might have an impact on practical exams
FRI 30 DEC
Possible road disruption
- Some National Highways traffic officers are on strike in the West Midlands and south-west England
- The strike involves control centre staff and traffic officers who deal with the aftermath of accidents
Border Force strikes
- Some Border Force staff are striking in England, Wales and Scotland meaning delays are likely for people arriving in the UK
- Birmingham, Cardiff, Gatwick, Glasgow, Heathrow and Manchester airports, and the port of Newhaven, will be affected
Driving test centre strikes
- Some driving examiners are on strike in the East Midlands, West Midlands, east of England and parts of London
- The industrial action will not affect theory tests but might have an impact on practical exams
SAT 31 DEC
Possible road disruption
- Some National Highways traffic officers are on strike in the West Midlands and south-west England
- The strike involves control centre staff and traffic officers who deal with the aftermath of accidents
Bus drivers on strike
- Bus drivers in London are taking industrial action
- The routes affected are mostly in south and west London
Border Force strikes
- Some Border Force staff are striking in England, Wales and Scotland meaning delays are likely for people arriving in the UK
- Birmingham, Cardiff, Gatwick, Glasgow, Heathrow and Manchester airports, and the port of Newhaven, will be affected
Driving test centre strikes
- Some driving examiners are on strike in the East Midlands, West Midlands, east of England and parts of London
- The industrial action will not affect theory tests but might have an impact on practical exams
SUN 1 JAN
There are currently no national strikes planned for this date
MON 2 JAN
There are currently no national strikes planned for this date
TUE 3 JAN
Rail disruption continues
- The National Union of Rail, Maritime and Transport Workers (RMT) are on strike
- The RMT strike will affect services in England, Scotland and Wales and people are being advised to avoid travelling if possible
Read more: What are the train strikes about?
Possible road disruption
- Some National Highways traffic officers across England are on strike
- The strike involves control centre staff and traffic officers who deal with the aftermath of accidents
Driving test centre strikes
- Some driving examiners are on strike in the East Midlands, West Midlands, east of England and parts of London
- The industrial action will not affect theory tests but might have an impact on practical exams
WED 4 JAN
Rail disruption continues
- The National Union of Rail, Maritime and Transport Workers (RMT) are on strike
- The RMT strike will affect services in England, Scotland and Wales and people are being advised to avoid travelling if possible
Read more: What are the train strikes about?
Bus drivers on strike
- Bus drivers in London are taking industrial action
- The routes affected are mostly in south and west London
Possible road disruption
- Some National Highways traffic officers across England are on strike
- The strike involves control centre staff and traffic officers who deal with the aftermath of accidents
Driving test centre strikes
- Some driving examiners are on strike in London, south-east and south-west England and Wales
- The industrial action will not affect theory tests but might have an impact on practical exams
THU 5 JAN
Rail disruption continues
- Train drivers across 15 rail companies represented by the Aslef union are on strike
- The rail companies affected are: Avanti West Coast, Chiltern Railways, CrossCountry, East Midlands Railway, Great Western Railway, Greater Anglia, Great Northern/Thameslink, London North Eastern Railway, Northern Trains, Southeastern, Southern/Gatwick Express, South Western Railway, SWR Island Line, TransPennine Express and West Midlands Trains
Read more: What are the train strikes about?
Bus drivers on strike
- Bus drivers in London are taking industrial action
- The routes affected are mostly in south and west London
Driving test centre strikes
- Some driving examiners are on strike in London, south-east and south-west England and Wales
- The industrial action will not affect theory tests but might have an impact on practical exams
FRI 6 JAN
Rail disruption continues
- The National Union of Rail, Maritime and Transport Workers (RMT) are on strike
- The RMT strike will affect services in England, Scotland and Wales and people are being advised to avoid travelling if possible
Read more: What are the train strikes about?
Possible road disruption
- Some National Highways traffic officers are on strike in the East Midlands and eastern England
- The strike involves control centre staff and traffic officers who deal with the aftermath of accidents
Driving test centre strikes
- Some driving examiners are on strike in London, south-east and south-west England and Wales
- The industrial action will not affect theory tests but might have an impact on practical exams
SAT 7 JAN
Rail disruption continues
- The National Union of Rail, Maritime and Transport Workers (RMT) are on strike
- The RMT strike will affect services in England, Scotland and Wales and people are being advised to avoid travelling if possible
Read more: What are the train strikes about?
Possible road disruption
- Some National Highways traffic officers are on strike in the East Midlands and eastern England
- The strike involves control centre staff and traffic officers who deal with the aftermath of accidents
Driving test centre strikes
- Some driving examiners are on strike in London, south-east and south-west England and Wales
- The industrial action will not affect theory tests but might have an impact on practical exams
SUN 8 JAN
Driving test centre strikes
- Some driving examiners are on strike in London, south-east and south-west England and Wales
- The industrial action will not affect theory tests but might have an impact on practical exams
MON 9 JAN
Driving test centre strikes
- Some driving examiners are on strike in London, south-east and south-west England and Wales
- The industrial action will not affect theory tests but might have an impact on practical exams
TUE 10 JAN
Bus drivers on strike
- Bus drivers in London are taking industrial action
- The routes affected are mostly in south and west London
Teachers in Scotland
- Some primary school teachers in Scotland are on strike
- Members of the NASUWT union are taking action as part of an ongoing dispute over pay
Read more: Which schools will teachers' strikes affect?
Driving test centre strikes
- Some driving examiners are on strike in London, south-east and south-west England and Wales
- The industrial action will not affect theory tests but might have an impact on practical exams
WED 11 JAN
Ambulance staff on strike
- Ambulance staff in London, Yorkshire, the North West, North East and South West of England are on strike
- The strike affects non-life threatening calls only and people are advised to use the 999 service in an emergency
Read more: Why are ambulance staff striking?
Teachers in Scotland
- Some secondary school teachers in Scotland are on strike
- Members of the NASUWT union are taking action as part of an ongoing dispute over pay
Read more: Which schools will teachers' strikes affect?
THU 12 JAN
Bus drivers on strike
- Bus drivers in London are taking industrial action
- The routes affected are mostly in south and west London
FRI 13 JAN
There are currently no national strikes planned for this date
SAT 14 JAN
There are currently no national strikes planned for this date
SUN 15 JAN
There are currently no national strikes planned for this date
MON 16 JAN
Bus drivers on strike
- Bus drivers in London are taking industrial action
- The routes affected are mostly in south and west London
Teachers in Scotland
- Teachers in Glasgow and East Lothian are on strike
- Members of the Educational Institute of Scotland (EIS) are taking action as part of an ongoing dispute over pay
Read more: Which schools will teachers' strikes affect?
TUE 17 JAN
Teachers in Scotland
- Teachers in Perth and Kinross and North Ayrshire are on strike
- Members of the Educational Institute of Scotland (EIS) are taking action as part of an ongoing dispute over pay
Read more: Which schools will teachers' strikes affect?
WED 18 JAN
Nurses in England on strike
- Members of the Royal College of Nursing (RCN) are taking industrial action over pay
- Life-preserving treatment must be provided, and all nurses in intensive and emergency care are expected to work
Teachers in Scotland
- Teachers in Orkney and Fife are on strike
- Members of the Educational Institute of Scotland (EIS) are taking action as part of an ongoing dispute over pay
Read more: Which schools will teachers' strikes affect?
THU 19 JAN
Nurses in England on strike
- Members of the Royal College of Nursing (RCN) are taking industrial action over pay
- Life-preserving treatment must be provided, and all nurses in intensive and emergency care are expected to work
Bus drivers on strike
- Bus drivers in London are taking industrial action
- The routes affected are mostly in south and west London
Teachers in Scotland
- Teachers in Moray and North Lanarkshire are on strike
- Members of the Educational Institute of Scotland (EIS) are taking action as part of an ongoing dispute over pay
Read more: Which schools will teachers' strikes affect?
FRI 20 JAN
Teachers in Scotland
- Teachers in Angus and East Dunbartonshire are on strike
- Members of the Educational Institute of Scotland (EIS) are taking action as part of an ongoing dispute over pay
Read more: Which schools will teachers' strikes affect?
SAT 21 JAN
There are currently no national strikes planned for this date
SUN 22 JAN
There are currently no national strikes planned for this date
Driving tests
Strike action by driving examiners is continuing at test centres in London, south-east England, south-west England and Wales.
The action by members of the Public and Commercial Services (PCS) union means some practical tests will not take place, although theory tests should go ahead.
If your driving test is due to take place on Saturday, you can check here whether your test centre is affected.
However, not all examiners are members of the PCS union so your test may go ahead as planned.
Unless you are told your test is definitely cancelled, you should still turn up.
The strike by driving examiners is scheduled to continue until Tuesday 10 January.
If your test is cancelled because of the strike, the DVSA will automatically rebook your test for you.
Other action
Strikes by some National Highways workers in the East Midlands and eastern England continue on Saturday. The PCS union says about 16 workers in the two regions are walking out.
The action involves control centre staff and traffic officers who deal with the aftermath of accidents.
National Highways says it has "well-rehearsed resilience plans in place" to cover the walkouts.
However, it warns that the strike action on the railways means that roads could be busier than usual.
How are you affected by the strikes? Are you taking part in strike action? You can email: haveyoursay@bbc.co.uk.
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