Rail fares will increase in line with the UK's retail price index (RPI)
Train fares are tied to the RPI, which measures the costs of a basket of goods, not the more commonly used CPI (consumer price index). Annual % change
Wages
RPI
CPI
0.5
1
1.5
2
2.5
3
3.5
4
Jul 2016
Jan 2017
Jul
Jan 2018
Jul