LONDON - One-third of British workers watch online porn in the office, according to a new study.

Approximately 33 percent admitted viewing "inappropriate material" and only 7 percent said they had been caught by co-workers or a superior.

56 percent of the workers surveyed admitted returning from work drunk after a lunchtime visit to a local pub, and 59 percent said they'd been sick in the office due to a hangover. Others admitted to drinking before work.

Office sex also figured in the survey, as 62 percent said they'd had an affair of some kind with a co-worker, while 25 percent accidentally emailed a colleague with sexual talk meant for a lover.

In addition to the confessions of cubicle sex, drinking and porn-viewing, 28 percent of the respondents confessed to falling asleep at their desks.

The report was conducted by British email security provider Proofpoint, based on 400 responses from UK office workers.

Proofpoint managing director David Stanley told the Telegraph newspaper, "A real crossover in the digital realm between personal and professional lives means staffs are increasingly relaxed in their use of workplace email and Internet."

"Working longer hours, and therefore using these technologies more to stay in touch with friends and family, can only heighten the risk," he said.

Recent surveys of American workers have yielded the same results: one-third of all business computer use is for porn. Canadian surveys led to similar findings.