The pound did not change its value in 1971 as a result of decimalisation. Nor did the shilling or the guinea, in fact - only the penny and amounts derived from

The pound did not change its value in 1971 as a result of decimalisation. Nor did the shilling or the guinea, in fact - only the penny and amounts derived from that. The reason £25,000 was then worth $125,000 and is now worth less is the fluctuation of currency prices over time. You can see a graph and some macroeconomic reasoning for why the dollar has continually strengthened against the pound at, among other sources, http://www.miketodd.net/encyc/dollhist.htm http://www.miketodd.net/encyc/dollhist.htm