Strike action has been announced by the RMT Union on 20, 22 and 29 July.

Thursday 20 July:

A very limited service will be in operation between approximately 08:00 and 22:00, structured as follows:

• 1 train per hour between London Marylebone and Banbury
• 1 train per hour between London Marylebone and Oxford
• 1 train per hour between London Marylebone and Aylesbury (via High Wycombe)
• 1 train per hour between Amersham and Aylesbury Vale Parkway

No Chiltern Railways services will operate on the following routes:

• between Banbury -and Birmingham Moor Street / Stourbridge Junction
• between Hatton and Stratford-upon-Avon

Saturday 22 July:

A very limited service will be in operation between approximately 08:00 and 22:00, structured as follows:

• 1 train per hour between London Marylebone and Banbury
• 1 train per hour between London Marylebone and Oxford
• 1 train per hour between London Marylebone and Aylesbury (via High Wycombe)

No Chiltern Railways services will operate on the following routes:

• between Banbury -and Birmingham Moor Street / Stourbridge Junction
• between Hatton and Stratford-upon-Avon

Additionally, the railway is closed between Amersham and Aylesbury all day due to planned engineering works. Rail replacement buses will operate as follows, connecting with London Underground services to / from Baker Street at Amersham:

• Amersham - Great Missenden - Wendover - Stoke Mandeville - Aylesbury - Aylesbury Vale Parkway

Saturday 29 July:

The plan for Saturday 29 July has yet to be confirmed. Details will be provided here once known. More information:

You can find more information by visiting the Chiltern Railways website. This includes information regarding the specific first and last trains that will operate each day.

Check before you travel: The National Rail Enquiries Journey Planner is not yet showing the strike day services. Below is a summary of when Journey Planners will be showing the revised timetable:

• For journeys on 20 July, please check back after 13 July
• For journeys on 22 July, please check back after 14 July
• For journeys on 29 July, please check back after 20 July