In some ways it is harder to prove attempted murder than murder - for attempted murder you need to prove that the person actually wanted to kill the other, but didn't manage it; for murder you need to show that the person wanted to cause GBH (or worse) but ended up killing the victim
I wonder how the facts of that case compared with the similar sounding one in Dalston where the driver chased and rammed a cyclist and was charged with causing serious injury by dangerous driving rather than attempted murder.
https://www.lbc.co.uk/news/london/east/hackney/woman-jailed-running-down-cyclist-road-rage-attack/