The work will affect trains on Tuesday (February 4) and Wednesday (February 5).
We have compiled all the details on these works so that you can plan your journey this week.
Tuesday and Wednesday (February 4 and February 5):
Haslemere area:
Due to maintenance work in the Haslemere area, some late evening services will be cancelled or replaced by buses for all or part of their journey.
A statement on the South Western Railway website says: “Late evening and early morning services may need to be altered for emergency repairs or planned work.
“We are sorry that bulky luggage, cycles and prams cannot be carried on the replacement bus services.
“Please check if you are planning to travel after 11pm or before 5.30am as buses may replace trains at short notice.”