All too familiar – and without witnesses I expect its your word against theirs unless he has been reported before.
To make you feel better someone cut me up on a round about last week on my way home from work. I looked at him and just shook my head and just cycled off. He blasted past shouting “I did see you mayte!” – so I returned “well why didn’t you give me space?……
You get jerks in all walks of life and unfortunately they are allowed to drive 🙁
But I would push it and see if you can get somewhere with it – he might not try it again if it goes as far as a police visit?