Due to the broad nature of the question and the wide range of DEFRA policies implemented in Slough, it is not possible to provide a detailed answer in the form requested.
As a local authority, Slough is obliged through statute to comply with central Government legislation. DEFRA's policy responsibilities are summarised in its departmental strategic objectives (DSOs) that have been agreed with the Treasury:
To promote a society that is adapting to the effects of climate change, through a national programme of action and a contribution to international action.
To promote a healthy, resilient, productive and diverse natural environment.
To promote sustainable, low carbon and resource efficient patterns of consumption and production.
To promote an economy and a society that are resilient to environmental risk.
To champion sustainable development.
To promote a thriving farming and food sector with an improving net environmental impact.
To encourage a sustainable, secure and healthy food supply.
To provide socially and economically sustainable rural communities.
To be a respected department delivering efficient and high quality services and outcomes.
One example is that Slough has included National Indicator 192 (amount of household waste recycled or composted) and National Indicator 186 (per capita reduction in CO2 emissions in the local authority area) in its local area agreement, which will encourage it to achieve higher levels of performance in these areas.
DEFRA publishes annual departmental reports which set out progress against its public service agreement targets and DSOs. The 2009 report is available at:
www.defra.gov.uk/corporate/about/how/deprep/2009-report.htm
Past reports available online in the National Archives.
For information on a specific DEFRA policy in Slough, the Government office for the south-east is able to provide information on implementation and the benefits to the area.