Ranked: The 20 regional cities with the fastest-growing property markets

"The prime residential sector is likely to remain strong through the rest of the year," says Savills in its latest World Cities Index.

The annual rate of UK property price inflation was running at +6.1% in August, according to Zoopla; that's more than double the rate recorded in August last year.

Knight Frank looks at the differential between the average prime property price and the top price achieved in ten global cities over the last five years