There are a number of valuable resources available on the Internet. Many are from government departments, educational institutions or not-for profit organisations.
Note: Before using any web sites, you need to evaluate the content and reliability of each site carefully.
You can improve your chances of finding relevant information by limiting your search results. To do this you can use the advanced search option and limit to education, government or organisation domains. The following search strategies could be used in Google:
educational institutions in the United Kingdom:
"evidence based practice" site:.ac.uk
"evidence based practice" site:.org
organisations in Australia
"evidence based practice" site:.org.au