Nearly one in five (19 percent) of UK firms ban staff from using their own gadgets at work, says Casio Projectors.

According to a study of 1,200 UK employees completed by YouGov, nearly two thirds (63 percent) of staff say they never take their own devices into the office, with 81 percent of those claiming it's because they have no need to.

Mobile phones were named the most popular 'Bring Your Own Technology' (BYOT) devices, with 29 percent of office workers admitting they bring their handset to work, while laptops came second with 15 percent. However, just three percent say they bring their tablet PCs to their work environment.

Casio said that with so much attention surrounding the concept of BYOT, office IT teams should be shifting their approach to support new types of technology in the workplace. But the reality of office tech is that much of it is chosen and supported centrally, meaning reliability and total cost of ownership are still the factors driving uptake.

"IT managers should choose office technology to suit their users' needs, as it seems most workers don't have a choice in the matter," Nieve Cavanagh, Senior Marketing Manager for Casio Projectors, said.

"It's important that people don't get distracted by the hype around employees bringing their own devices into the office."

However, the 2011 ISACA Shopping on the Job Survey, revealed that the BYOT trend is causing a security headache for firms as not all staff are as security conscious as they should be when accessing the web via the company's network from these devices. Furthermore, these devices are also more difficult to make secure.

Two in five of those surveyed admitted to clicking on a social media link from a unknown source, while 15 percent also said they've clicked on email links despite being from strangers..

The survey revealed Brits plan to spend 29 hours shopping online during the festive season this year. Furthermore, 23 of these hours will be spent on a work device or a personal device also used for work and nine of them will be during the working day, which could potentially lead to an even bigger security risk.

"Employees are unwittingly risking bringing viruses and malware into work. New this holiday season is growing BYOT, so organisations must focus on embracing emerging technology and educating employees on security," said Ken Vander Wal, CISA, CPA, international president of ISACA.

Marc Vael, director, ISACA, added while 54 percent of employees have a personal device they use for work indicating "BYOT is here to stay," most firms say the risk outweighs the benefits so "education is strongly needed."