UPDATE 2 January 2013 - SCMS has now been replaced by Yortender - many local procurement opportunities are advertised on Yortender. A national service called Contracts Finder (this replaced Supply2Gov) is still also available.
However, many smaller procurement opportunities are not widely advertised and organisations have to make themselves known to potential buyers.
Bradford Council's website has information on the various current contracts that are in place across the Council and the types of goods, services and works they purchase, as well as how to apply to be an approved supplier to the Council.