London is at risk of a property bubble and Birmingham is offering a strong alternative, according to the man who sells the city to the world.

The Postrevealed this week that a prominent survey named Birmingham as the most investable city in the UK and the sixth most-investable in Europe.

The report, Emerging Trends in Real Estate, by Urban Land Institute (ULI) and adviser PwC, revealed the city rose from 17th in 2014 with experts spotting rising potential gains.

Neil Rami, chief executive of inward investment programme Marketing Birmingham, said investors would have sat up and noticed the city's six per cent annual rise in gross value-added (GVA) and major schemes like the HS2 Birmingham Curzon Masterplan.

Mr Rami said: "While major cities like London risk generating a property bubble, Birmingham's new developments and its rising GVA - which is increasing more than any other UK core city - are creating a sustainable investment destination for companies across the world."

London was only tenth on this year's survey due to prices being pushed up by sovereign wealth funds, pension funds and Asian insurers.

No other UK cities were named in the top 25 other than Edinburgh in 19th place. The research comes from a survey more than 500 of Europe's top real estate investment experts by PwC and ULI.

Mr Rami said investors could see Birmingham was replacing the city centre concrete with modern developments.

He also pointed to schemes like the £600 million redevelopment of New Street station and the £500 million regeneration of Paradise Circus as something investors have taken note of.

The city is also home to the largest number of start-ups created outside London, with 18,000 businesses created in the past year.

He added: "More international investors than ever are recognising the true potential of Birmingham's real estate market.

"The city offers a great return on investment - the cost of property in Birmingham is more competitive than larger European cities such as London and Paris, but rents are rising quickly thanks to a growing local economy.

"The multi-million pound transformation of Birmingham's infrastructure, its retail offer and transport networks is creating a city that businesses are flocking to.

"Global investors from locations ranging from China to Germany have been spending heavily on sites in the city centre."

David Smeeton, director of national investment with property consultancy Colliers International in Birmingham, said the concept of 'wall of money' was back.

"Investors simply cannot derive the returns they require from the central London and South East investment markets and are being forced up the risk curve and out into the regions," he said.

"Birmingham's infrastructure investment programme sets it apart from other regional cities.....there is a huge opportunity for economic growth and job creation.

"The next wave of speculative office development is about to begin - there has never been a better time to be doing deals in Birmingham."