The EU Commission IDABC reports about a cost saving success in Bristol:
Bristol City Council's switch to StarOffice in 2005 has led to a major reduction of IT costs, says Gavin Beckett, the council's ICT Strategy manager. … In 2006 Bristol took the further step of adopting the ISO-approved Open Document Format (ODF). Speaking at a conference on ODF in the Netherlands last month, Beckett said that implementing StarOffice for 5,500 desktops in Bristol saved 1.1 million GBP (1.4 million euro) in comparison to the total cost of implementing Microsoft Office. "The licences for StarOffice cost us 186,000 GBP (243,000 euro), in comparison to 1.4 million GBP (1.8 million euro) for MS Office."
http://ec.europa.eu/idabc/en/document/7409
Bristol acknowledges that its pioneer switch needs to be followed by a market learning process. Bristol needs to interoperate with less advanced Cities that use another format.

