So, friend may get a driving ban if...

So, i used to being in the car as passanger with my friend. Drove normally for years till a few days ago. Tells me he is dying of liver failure, which is true. However, he began to start driving reckless, speeding over 100 mph than should need to. Three times in a row... the first time, did not think much of it, second time ...it concerned me, and third time... i had to do a cam dash to record in private to get evidence that he speeding reckless for no regard for anyone else life on the road..


So, I'm debating whenever or not i should tell the DVLA about his health condition that may cause him to crash and possibly kill someone else along with him.. i have the footage..... if I dob him in ... it will make me a shitty friend if I don't... someone could potentially die and I could had done something to prevent it..