Startups are falling out of love with London after just 12 months despite its reputation as the home of the British Tech scene, research from Sussex Innovation Croydon has found.

The business incubation network, which is wholly owned by the University of Sussex, polled the attitudes of 500 small business leaders across London and South East and found a startling change in attitudes after a year of operation.

The likelihood of leaving London jumps by almost half within a year of starting up, from 47% considering re-location to 66%.

The research also found that it takes another eight years of operation for attitudes to return to the same balance as during the first 12 months.

Rising property rents appear to play a key role in the switch of attitudes. Amongst firms established for less than 12 months, a minority (37%) agreed property rents would hold back growth, this switches to a majority (62%) after a year, declining to 53% after three to five years, and back to a minority (31%) after 9 years or more.

There was similarly a stark doubling after a year, rising from 8% to 20%, in the number feeling they were held back by a lack of proximity to like-minded business.

Mike Herd, executive director of Sussex Innovation at the University of Sussex, said: “Our findings reflect the startup journey; a London address provides kudos and contacts when you begin but a year later, the honeymoon is over as bills start to flow in.

“In a reverse of the seven year itch, our polling shows small firms fall back in love with London only once they’re well established. If London is to hang on to more growth businesses it needs to look again at business rates and affordability.”

The research reflects the importance such business coaching has on the success of startup ventures.

Bosses quizzed on the value of various support services, showed a rapid increase in interest in access to skilled counsel after one to two years, rising from 41% to 54%. Similarly the number feeling such support services were of little value fell from 28% to 15% after just one year.

Herd added: “The startup mentality is something we’ve long studied. A classic response to cashflow problems is to seek savings from the bottom line, but this is often a false economy, what you save on rent you lose in connections and support networks.

“The world is full of people with ideas and low on experience, support networks such as our own can bridge that gap, ensuring ideas become successful commercial innovations.

“As we open our first off-campus incubator, it is important we adjust to the mind-set of London entrepreneurs.”