Inflation means that prices go up over time. So, when choosing your premium and cash sum, you need to bear in mind that inflation will reduce the buying power of the cash sum over time. For example, the chart below shows the increase in the price of a pint of milk over the last 25 years. So the buying power of a fixed sum, say £1, has reduced over time:

Source: National Statistics website: www.statistics.gov.uk Crown copyright material is reproduced with the permission of the Controller of HMSO