Rail passengers have been warned that services could be reduced on Thursday as train drivers begin banning overtime ahead of a new series of strikes.
The overtime ban will run from Thursday to Saturday and for 48 hours starting next Monday, and could result in service delays or cancellations.
“Please plan your journey and check the times of the first and last trains,” the JNR warned.
Meanwhile, the M25 in Surrey is closed counter-clockwise between J6 (Godstone) and J5 (M26 Link) due to a serious collision.
Southeast National Highway warned of delays of at least 30 minutes.
Scroll down for the latest travel updates.
M25 closure warning due to collision
07:27 , matt watts
Drives are being warned of delays after M25 closes counterclockwise between J6 (Godstone) and J5 (M26 link).
Warning of delays and suspensions due to industrial action by train drivers
07:24 , matt watts
Train drivers will begin banning overtime on Thursday ahead of a new round of strikes that will cause travel disruption for passengers.
Asref members have been embroiled in a 20-month-long employment dispute with no sign of relief or plans for negotiations.
Passengers are urged to check before traveling as there will be no service in some areas on the day of the strike.
The overtime ban will run from Thursday to Saturday and for 48 hours starting next Monday, and could result in service delays or cancellations.
Friday's strike will hit Avanti Westcoast, Cross Country, East Midlands Railway, West Midlands and London Northwestern.
Chiltern Railway, Great Western Railway, LNER, Heathrow Express, Northern Express and TransPennine Express train drivers will depart on Saturday.
Monday's strike will affect C2C, Gatwick Express, Greater Anglia (including the Stansted Express), Great Northern, South Eastern, Southern and South Western Railway (including the Island Line) and Thameslink.
Rail operators have warned that on the day of the strike, there is likely to be little or no service across large areas of the network operated by affected railway companies.
Services will also be disrupted and could begin late the next day after the full-scale strike.
On days when out-of-hours operations are prohibited, some railway companies may revise their schedules in advance, or sudden delays or cancellations may occur on the same day.
Passengers have been warned to expect significant disruption and are advised to plan ahead and check before traveling.
A law aimed at ensuring a minimum level of service during railway strikes is currently in force, but none of the operators involved in the Aslef dispute have applied to take advantage of it.
