There is a page on the Public Sector Food Procurement Initiative web site that is devoted to providing advice to UK farmers on how to supply fruit and vegetables and other produce to the public sector. The page can be found at:
The page, for example, contains the guide "Selling to the public sector" which explains how growers (and farmers) can take advantage of opportunities to supply food to the public sector either directly or indirectly via the supply chain of a primary supplier. The guide also includes short case studies showing how small and local producers have worked successfully with the public sector and lists useful sources of further information and advice.
DEFRA is also funding the Government offices for the regions to undertake workshops and projects to improve the supply of domestically grown fruit and vegetables into the public sector. It is also working through key stakeholders such as the NFU and English Farming and Food Partnerships to provide advice and support to producers.