Strikes by train drivers are causing major disruption in parts of England.

Different operators are being affected every day up to and including Friday due to the walkout by members of the Aslef union.

Here is a breakdown of which operator is affected and when:

– Wednesday

Gatwick Express: No services.

South Western Railway: Trains will run between 7am and 7pm only, and on a small number of lines.

The only routes open will be between London Waterloo and each of Basingstoke; Woking; Guildford via Woking; and Feltham via Twickenham; and between Basingstoke and Salisbury.

Southeastern: No services.

Southern: No services except a shuttle between London Victoria and Gatwick Airport only.

– Thursday

CrossCountry: No services.

Great Western Railway: Trains will run between 7am and 7pm only, and on a small number of lines.

The only routes open will be between London Paddington and Bristol Temple Meads; London Paddington and Oxford; Reading and Basingstoke; Reading and Redhill (peak time only); Reading and Newbury (peak time only); Westbury and Swindon (peak time only); Cardiff Central and Bristol Temple Meads; Exeter St Davids and Barnstaple (peak time only); Exeter St Davids and Exmouth (calling at Exeter Central, Digby and Topsham only); Plymouth and Gunnislake; and Penzance and St Ives.

Heathrow Express: Trains will run between 7.01am and 7pm only, and at a reduced frequency.

– Friday

Northern: No services.

TransPennine Express: No services.

In addition to the strikes, Aslef has also implemented an overtime ban up to and including Saturday, which is disrupting many English train operators.

Severe weather is also causing delays and cancellations on parts of the network.