A real estate search firm adds its voice to the chorus of those saying that despite hiccups and concerns, London is top of the list for Asia buyers.

The drumbeat of noise about how Asian investors, such as from Hong Kong, want to snap up properties in London, continues.

According to Dominic Field, co-founder and chief executive of Temple Field Property, a boutique real estate search firm, London is the target of "unimaginable" investment despite worries about how a possible future UK government might hit high-value properties with a so-called "Mansion Tax". Much of this investment, he said, comes from Asia.

The UK capital is “receiving a generation of regeneration over a five-year period” according to Field. Demand now so strong that the Pall Mall-based outfit said it will be travelling to Hong Kong in the weeks ahead to host an investment seminar for private client advisors, and a series of briefings with wealthy prospective buyers.

According to a recent report by Savills, the global property firm, London is now the most expensive city in which to work and live, supplanting Hong Kong for the first time in such a ranking for five years. And yet, if Temple Field Property is to be believed, the high cost of prime residential property is not - yet - a deterrent for Asian buyers. In recent times it has been said that London's high prices are driven by a relative lack of supply (arguably caused by planning restrictions), low interest rates and safe-haven buying from the Middle East, Asia and the former Soviet Union.

In a commentary on the state of the market, Temple Field said it is hard to see a sharp reversal of London's global appeal.

“The dominance of London compared with the rest of the UK has never been wider, and is set to increase steadily in the years ahead”, according to Field. As evidence, his firm cited data from the Centre for Economics and Business Research forecasting that London prices will rise by as much as 54 per cent by 2020.

Although sellers are cautious on pricing in part as a reaction to the uncertainty starting to build around the General Election and the threat of a Mansion Tax, Field added: “However, we expect this uncertainty to remain only until the end of the second quarter or third quarter next year”.

Meanwhile, in a sign of the Asia appetite for London property, the UK's Royal Mail has sold its former central London sorting office next to the Paddington railway station to a Singaporean consortium for £111 million.