The reliability of broadband services is a major concern for UK small businesses, a Citizens Advice study has found.
In a survey of 2,000 small firms, 30 per cent of respondents said they are worried about the potential for internet outages.
A third said they have experienced problems with their broadband or phone service in the last 12 months, while more than half claimed they would lose money or be unable to trade at all if their internet connection goes down.
Citizens Advice found that almost a quarter have complained to their broadband provider about problems in the past.
Gillian Guy, Chief Executive of Citizens Advice, said poor broadband services "are costing small firms business".
"Many are using the internet to communicate with customers, place orders for stock and shop around for the best priced supplies," she noted.
"A reliable broadband service is essential for firms to be able to operate."