According to a computing.co.uk article entitled Open Source: The government’s commitment so far, most of the IT technology used in the UK government is still proprietary and comes from single vendors.
Open source adoption by government agencies in the UK is progressing, but is still being hindered by a focus on “free as in gratis.” Decisions based on cost-of-acquisition alone ignore the other real and more important values offered by open source, which are derived from “free as in freedom.”
Read more at OpenSource.com