It looks like open source is gaining ground in the UK Education market. A survey released by Open Source body, OSS Watch, and entitled Survey 2006 shows that more than three-quarters of colleges and universities have considered using open source applications.
An article from ITweek mentions that "Seventy-seven percent of academic institutions said they examine open-source options on a regular basis, according to a survey released yesterday by OSS Watch, an advisory service for education that is funded by Jisc, a committee that advocates innovative use of IT in education."
However, only a quarter of the respondents though made specific reference to "Open Source" in their IT decisions. This is thought to be on the rise though as education packages like Moodle get more popular.