KBH On-Train Media is a London-based company with 35 employees that has been a market leader in on-train advertising for ten years, placing ads on 65,000 spaces across 6,500 carriages concentrated in London and the Southeast. Their ads reach over 7 million individuals every four weeks and are proven to be effective, with 48% of viewers researching ads, 33% discussing them, and 24% making purchases after seeing the ads.