It's quite possible they would advise a solicitor is present if they plan on doing a taped interview. Just to cover everyone's arses. You've got to think that if the car driver is found to be at fault then he's looking at death by dangerous driving (or something to that effect) so they're gonna wanna make sure any evidence given is accurate. If for any reason the interviewee lies about the incident then they'd likely be up on charges so just best to have a solicitor there
Im not sure why I think this or where I have read it but I think there is something about the lead rider being culpable in some way for encouraging the rider behind to ride fast (keep up )