Unclear lane markings on roundabout.

There are too many instances on this roundabout where cars nearly side swipe me or other cars, and this is because people are often in the wrong lane. Lane? There are no clear markings on this roundabout. With an increase in the volume of incompetent drivers, there is a greater risk of accidents on roundabouts like this. You can see in my crudely hand drawn diagram in green where I believe which lane is appropriate for each junction and in red where encroachment/ side swipe risk regularly happens. Please can this roundabout be marked with clear lanes for specific exits to prevent unnecessary accidents occurring. Thankyou.