| Image | Title | Source / methodology |
 | Parliament image | Sampajano_Anizza/Shutterstock.com |
 | Electric car charging image | Smile Fight/Shutterstock.com |
 | Composer image | SunnyGraph/Shutterstock.com |
| Rail electrification data | ‘2 thirds not yet electrified’ | https://www.networkrail.co.uk/running-the-railway/looking-after-the-railway/track/third-rail/ |
