Govia Thameslink Railway

Habitats have been installed in Horley in Surrey and Glynde, Plumpton and Berwick in East Sussex.

The obstruction has been reported on the tracks between Redhill and Purley.

Thameslink, Southern and Southeastern trains are due to be affected across the four days.

Trains between Horsham and Arundel are affected after a fire at a substation in Pulborough.

London Underground fares rise 4.6% and adult cable car journeys go up 16.7% but buses remain £1.75.

A transport minister tells MPs the performance of the rail operator "has not been what we expect".

Govia Thameslink Railway is offering 9,000 tickets to schoolchildren and college students.

Passengers are being advised to check their journeys before travelling.