If a faster car comes up behind me and wants to unlap itself, even if I'm some way down the field, I'm not obliged to let that happen, is that correct? (Although it may be in my interest to let him through to get him out of my mirrors). And if the other guy is a mid-race joiner, he shouldn't even be trying to pass, is that also true? Earlier today a guy (who on viewing the replay did turn out to be a mid-race joiner) crashed trying to pass me when I was on the tail of another car for about 10th place with a couple of laps to go, and seemed to suggest his crash was my fault for not leaving him room. I'm normally quite accommodating but in this case I didn't want a lapped car between me and the guy I was chasing so I held my racing line. The impact cost me a couple of seconds so I was not able to catch back up again. No great loss but I wanted to check I had the correct understanding.