Index-linking - RPI

The Retail Prices Index or Retail Price Index - RPI - is a measure of inflation published monthly by the Office for National Statistics. It measures the change in the cost of a representative sample of retail goods and services. RPI was first calculated for June 1947 and was once the principal official measure of inflation. It has been superseded by the Consumer Price Index (CPI).
For the indices since 1974 and to calculate the RPI percentage change and apply the percentage to the rent for the adjusted figure, please visit RPI and Rent Calculator.

With commercial property, rent reviews are generally to the open market rent, but sometimes the rent would be adjusted to the Retail Price Index (RPI). For further reading, please visit LandlordZone