List of announcement systems by National Rail stations – I
| Station | Station Managed By | CIS Managed By | System | Years | Voice | Platforms | Details |
|---|---|---|---|---|---|---|---|
| Ifield | Southern | Southern | Amey | 2002 to 2018 | Celia Drummond | 2 | |
| Phil Sayer | 1 | ||||||
| Worldline | 2018 to Current | Anne Jermy | 1 | ||||
| Matthew Streeton | 2 | ||||||
| Ilford | |||||||
| Ilkeston | |||||||
| Ilkley | Northern | Northern | Funkwerk | 2008 to 2015 | Phil Sayer | Global | |
| KeTech | 2015 to Current | Celia Drummond | Global | ||||
| Imperial Wharf | London Overground | London Overground | Worldline | 2009 to 2014 | Anne Jermy | 1, 2 | |
| Amey | 2014 to 2024 | Emma Hignett | 1, 2 | ||||
| Worldline | 2024 to Current | Anne Jermy | 1, 2 | ||||
| Ince | Northern | Northern | KeTech | 2019 to Current | Celia Drummond | Global | |
| Ince And Elton | |||||||
| Ingatestone | |||||||
| Insch | |||||||
| Invergordon | |||||||
| Invergowrie | |||||||
| Inverkeithing | |||||||
| Inverkip | Scotrail | Network Rail | KeTech | 2006 to 2010 | Alison McKay | 1 | |
| Zenitel iVENCS | 2010 to Current | Scottish Female | 1 | ||||
| Inverness | Scotrail | Scotrail | KeTech | 2006 to Current | Alison McKay | Global | |
| Inverness Airport | Scotrail | Scotrail | KeTech | 2023 to Current | Alison McKay | 1, 2 | |
| Invershin | |||||||
| Inverurie | |||||||
| Ipswich | |||||||
| Irlam | Northern | Northern | KeTech | 20?? to Current | Celia Drummond | Global | |
| Irvine | |||||||
| Isleworth | |||||||
| Islip | Chiltern Railways | Chiltern Railways | KeTech | 2015 to 2021 | Celia Drummond | 1 | |
| Phil Sayer | 2 | ||||||
| 2021 to Current | Celia Drummond | 1, 2 | |||||
| Iver | Great Western Railway | Great Western Railway | Racal | 1998 to 2011 | Boofay | 1, 2-3, 4 | |
| Worldline | 2011 to 2018 | Anne Jermy | 1, 4 | ||||
| Rodger | 2-3 | ||||||
| Elizabeth Line | Elizabeth Line | Worldline | 2018 to Current | Anne Jermy | 1, 2-3, 4 | ||
| Ivybridge |