London is again experiencing a boom in house prices. The capital city continues to race ahead above other European cities and other property markets, with growth of over 8% for those luxury, high end properties. The Guardian has reported the exact percentage of the 'annual luxury home price rise' as 8.1%, which has caused many properties in the city to be valued at over £1m. The Cause? It could be due to the rising demand which has been growing faster than the capitals' supply.