Worries about economic downturn and sovereign risk dropped, but concerns about geopolitical risk rose sharply among British banks, building societies, insurers and investment funds. Some 57% of firms named it as a big concern, up from just 13% in October 2013, making it the second-most cited risk.
"Perhaps unsurprisingly given the ongoing tensions in Ukraine, geopolitical risk was the fastest-growing risk category compared to six months ago," the BoE said. "All responses citing a specific region mention the Russian/Ukrainian conflict."
The BoE conducted its survey of 72 risk managers between April 7 and May 12 a time when scores of people died in street battles between supporters and opponents of Russia in separatist regions of Ukraine.
Concern about a renewed economic downturn remains the top worry and was named by 61% of the risk managers surveyed by the BoE, down from 67% in the last survey in October.
But the overall level of concern that a major shock might hit Britain's financial system was its lowest since the survey started in 2008 possibly reinforcing the BoE's worry that unusually low recent volatility in financial markets may cause complacency.
Just under two thirds of firms think the chance of an economic shock hitting Britain in the next year is either low or very low. The proportion seeing little risk for the next one to three years rose by 12 percentage points to 28%.
The top worry remained an economic downturn either globally, or concentrated in Britain and was cited by 61% of firms, down from 67% in October.
Fears of a house price crash concerned 40%, up from 36% six months earlier.
BoE governor Mark Carney has described the rapid rise in house prices and associated lending as the biggest potential domestic risk to Britain's financial stability.