If you’re planning to continue painting the following day, you can wrap tin foil or cling-film around your brushes and rollers to prevent them from drying out.
When you’ve finished painting, remove as much of the paint from brushes and rollers as possible and add this back into the tin. Rinse brushes and rollers in a bowl of warm soapy water and allow dirty water to dry out. To help reduce water waste and prevent paint from entering drains, avoid cleaning brushes under a running tap.
The British Coatings Federation have created this handy video on how to clean your brushes and rollers.