You can order free HIV self sampling postal kits here. Please note that free postal test kits are available for adults living in Slough, West Berkshire, Wokingham and the Royal Borough of Windsor and Maidenhead.
Collect a small spot of blood at home and send it off in the post for testing. You'll be contacted by phone or text with your result in a few days.
For most HIV tests that require a blood sample it is possible to get reliable results from four weeks after possible infection. If you take a test before this your result may not be accurate.