If you have a car park season ticket, you can use it at any other South Western Railway car park on the strike day (space permitting). If you normally buy a car parking ticket on the day, you will need to pay the usual parking fee for that station.
The SWR app contains live car park availability. Please note that Guildford car park is Network Rail managed and therefore not covered by this arrangement.
We cannot guarantee that a space will be available at alternative stations; some car parks do reach capacity and you may need to allow time to find alternative parking.